Units & Conversions Calculators — United Kingdom
Every converter uses the exact international definitions — the same factors whether you are in United Kingdom or anywhere else — with the units you use first.
Measurement
Length Converter
Convert between metric and imperial lengths — millimetres to miles, feet to metres, inches to centimetres — using the exact international definitions of the inch (25.
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Area Converter
Convert areas between square metres, hectares, square feet, acres and square miles — the units that appear on floor plans, land titles, listings and maps.
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Volume Converter
Convert litres, millilitres and cubic metres to US and imperial gallons, pints, cups and fluid ounces — including the difference between a US pint and an imperial pint.
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Weight Converter
Convert kilograms, grams and tonnes to pounds, ounces, stone and tons — with the exact international pound (0.
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Density Converter
Convert kg/m³, g/cm³, kg/L, lb/ft³ and lb/gal — densities of water, concrete, steel, fuels and building materials.
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Physics & engineering
Temperature Converter
Convert Celsius, Fahrenheit and kelvin — body temperature, oven settings, weather and lab values — with the exact formulas shown.
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Speed Converter
Convert km/h, mph, metres per second, knots and Mach — speed limits, wind speeds, running paces and aircraft speeds.
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Pressure Converter
Convert kPa, bar, psi, atmospheres, millibars and mmHg — tyre pressures, weather charts, blood pressure and engineering specs.
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Energy Converter
Convert kilojoules and calories on food labels, kilowatt-hours and megajoules on energy bills, BTUs and therms — all through the joule.
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Power Converter
Convert kilowatts to horsepower (and metric PS), watts, megawatts, BTU/h and tons of refrigeration — engines, motors, heaters and air-conditioners.
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Everyday
Time Converter
Convert seconds, minutes, hours, days, weeks, months and years — using the average Gregorian month and year so long spans stay accurate.
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Data Storage Converter
Convert bytes, kilobytes, megabytes, gigabytes and terabytes — and see why a 1 TB drive shows as 931 GiB — with both decimal (10³) and binary (2¹⁰) units.
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Angle Converter
Convert degrees, radians, gradians, arcminutes, arcseconds, turns and mils — for maths, surveying, astronomy and engineering.
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Fuel Economy Converter
Convert litres per 100 km to mpg — and between UK and US mpg, which use different gallons — plus kilometres per litre.
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Popular conversions
CM to Inches Converter
Convert centimetres to inches — 1 cm is 0.
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Inches to CM Converter
Convert inches to centimetres — one inch is exactly 2.
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Metres to Feet Converter
Convert metres to feet — one metre is 3.
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Feet to Metres Converter
Convert feet to metres — one foot is exactly 0.
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KM to Miles Converter
Convert kilometres to miles — one kilometre is 0.
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Miles to KM Converter
Convert miles to kilometres — one mile is exactly 1.
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MM to Inches Converter
Convert millimetres to inches — 25.
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Feet to Inches Converter
Convert feet to inches — twelve to the foot, the conversion behind every height and timber length.
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Inches to Feet Converter
Convert inches to feet — divide by twelve, with the remainder as the leftover inches.
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Metres to CM Converter
Convert metres to centimetres — a hundred to the metre, just a decimal shift.
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CM to MM Converter
Convert centimetres to millimetres — ten to the centimetre.
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Yards to Metres Converter
Convert yards to metres — one yard is exactly 0.
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Metres to Yards Converter
Convert metres to yards — one metre is 1.
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KM to Metres Converter
Convert kilometres to metres — a thousand to the kilometre.
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Inches to MM Converter
Convert inches to millimetres — 25.
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MM to CM Converter
Convert millimetres to centimetres — ten to the centimetre.
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CM to Metres Converter
Convert centimetres to metres — a hundred to the metre.
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Metres to Miles Converter
Convert metres to miles — 1,609.
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Miles to Feet Converter
Convert miles to feet — 5,280 feet to the mile.
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Millimetres to Metres Converter
Convert millimetres to metres — divide by 1,000, the simplest step on the metric ladder.
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Metres to Millimetres Converter
Convert metres to millimetres — multiply by 1,000, which is how most construction drawings are dimensioned.
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Centimetres to Kilometres Converter
Convert centimetres to kilometres — divide by 100,000, a five-place jump across the metric scale.
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Millimetres to Kilometres Converter
Convert millimetres to kilometres — divide by one million, the widest common step in the metric system.
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Metres to Kilometres Converter
Convert metres to kilometres — divide by 1,000, the step behind every running distance and road sign.
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Kilometres to Feet Converter
Convert kilometres to feet — one kilometre is 3,280.
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Feet to Miles Converter
Convert feet to miles — 5,280 feet make one mile, a figure fixed by statute in 1593.
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Feet to Yards Converter
Convert feet to yards — three feet to the yard, exactly, the conversion behind fabric, fencing and American football.
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Yards to Feet Converter
Convert yards to feet — multiply by three, exactly.
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Miles to Yards Converter
Convert miles to yards — 1,760 yards make a mile.
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Inches to Yards Converter
Convert inches to yards — thirty-six inches to the yard.
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Yards to Inches Converter
Convert yards to inches — multiply by thirty-six.
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Centimetres to Feet Converter
Convert centimetres to feet — 30.
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Feet to Centimetres Converter
Convert feet to centimetres — one foot is exactly 30.
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Miles to Nautical Miles Converter
Convert statute miles to nautical miles — a nautical mile is about 15% longer.
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Nautical Miles to Miles Converter
Convert nautical miles to statute miles — 1.
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Kilometres to Centimetres Converter
Convert kilometres to centimetres — multiply by 100,000.
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Centimetres to Yards Converter
Convert centimetres to yards — 91.
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Yards to Centimetres Converter
Convert yards to centimetres — one yard is exactly 91.
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Kilometres to Inches Converter
Convert kilometres to inches — one kilometre is 39,370.
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Feet to Millimetres Converter
Convert feet to millimetres — one foot is exactly 304.
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Millimetres to Feet Converter
Convert millimetres to feet — 304.
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Metres to Millimetres Converter
Convert metres to millimetres — multiply by a thousand.
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Millimetres to Metres Converter
Convert millimetres to metres — divide by a thousand.
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Centimetres to Metres Converter
Convert centimetres to metres — divide by a hundred.
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Metres to Centimetres Converter
Convert metres to centimetres — multiply by a hundred.
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Kilometres to Metres Converter
Convert kilometres to metres — multiply by a thousand.
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Metres to Kilometres Converter
Convert metres to kilometres — divide by a thousand.
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Miles to Metres Converter
Convert miles to metres — one statute mile is exactly 1,609.
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Nautical Miles to Metres Converter
Convert nautical miles to metres — one nautical mile is exactly 1,852 m.
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Metres to Nautical Miles Converter
Convert metres to nautical miles — divide by 1,852.
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Yards to Millimetres Converter
Convert yards to millimetres — one yard is exactly 914.
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Millimetres to Yards Converter
Convert millimetres to yards — divide by 914.
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Inches to Kilometres Converter
Convert inches to kilometres — 39,370 inches to the kilometre.
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Square Metres to Square Feet Converter
Convert square metres to square feet — one square metre is 10.
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Square Feet to Square Metres Converter
Convert square feet to square metres — divide by 10.
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Acres to Hectares Converter
Convert acres to hectares — one hectare is about 2.
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Hectares to Acres Converter
Convert hectares to acres — multiply by 2.
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Square Feet to Acres Converter
Convert square feet to acres — 43,560 square feet to the acre.
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Acres to Square Feet Converter
Convert acres to square feet — multiply by 43,560.
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Square Metres to Hectares Converter
Convert square metres to hectares — 10,000 square metres to the hectare.
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Square KM to Square Miles Converter
Convert square kilometres to square miles — one square mile is 2.
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Square Miles to Square KM Converter
Convert square miles to square kilometres — multiply by 2.
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Square CM to Square M Converter
Convert square centimetres to square metres — ten thousand to the square metre.
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Square Inches to Square CM Converter
Convert square inches to square centimetres — 6.
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Square Yards to Square Metres Converter
Convert square yards to square metres — one square yard is 0.
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Square Metres to Square Yards Converter
Convert square metres to square yards — one square metre is 1.
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Square Feet to Square Inches Converter
Convert square feet to square inches — one square foot is 144 square inches.
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Square Millimetres to Square Centimetres Converter
Convert square millimetres to square centimetres — divide by 100, not by 10.
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Square Feet to Square Yards Converter
Convert square feet to square yards — nine square feet to the square yard.
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Square Yards to Square Feet Converter
Convert square yards to square feet — multiply by nine.
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Acres to Square Metres Converter
Convert acres to square metres — an acre is 4,046.
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Square Metres to Acres Converter
Convert square metres to acres — 4,046.
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Square Kilometres to Hectares Converter
Convert square kilometres to hectares — one hundred hectares to the square kilometre.
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Hectares to Square Kilometres Converter
Convert hectares to square kilometres — divide by one hundred.
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Square Metres to Square Millimetres Converter
Convert square metres to square millimetres — multiply by a million, not a thousand.
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Square Millimetres to Square Metres Converter
Convert square millimetres to square metres — divide by a million.
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Hectares to Square Feet Converter
Convert hectares to square feet — one hectare is 107,639 square feet.
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Square Feet to Hectares Converter
Convert square feet to hectares — 107,639 square feet make a hectare.
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Square Metres to Square Kilometres Converter
Convert square metres to square kilometres — divide by a million.
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Square Kilometres to Square Metres Converter
Convert square kilometres to square metres — multiply by a million.
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Acres to Square Kilometres Converter
Convert acres to square kilometres — 247.
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Square Kilometres to Acres Converter
Convert square kilometres to acres — multiply by 247.
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Hectares to Square Metres Converter
Convert hectares to square metres — a hectare is exactly 10,000 m².
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Square Centimetres to Square Inches Converter
Convert square centimetres to square inches — 6.
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Square Inches to Square Feet Converter
Convert square inches to square feet — 144 square inches to the square foot.
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Square Miles to Acres Converter
Convert square miles to acres — exactly 640 acres to the square mile.
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Acres to Square Miles Converter
Convert acres to square miles — divide by 640.
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Litres to Gallons Converter
Convert litres to US gallons — one US gallon is 3.
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Gallons to Litres Converter
Convert US gallons to litres — multiply by 3.
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ML to Fluid Ounces Converter
Convert millilitres to US fluid ounces — 29.
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Cups to ML Converter
Convert US cups to millilitres — one US cup is 236.
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Litres to ML Converter
Convert litres to millilitres — a thousand to the litre.
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Pints to Litres Converter
Convert imperial pints to litres — the UK pint is 0.
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Tablespoons to ML Converter
Convert tablespoons to millilitres — and mind the country, because the tablespoon is not the same everywhere.
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Litres to UK Gallons Converter
Convert litres to imperial gallons — 4.
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UK Gallons to Litres Converter
Convert imperial gallons to litres — multiply by 4.
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Fluid Ounces to ML Converter
Convert US fluid ounces to millilitres — 29.
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Teaspoons to ML Converter
Convert teaspoons to millilitres — 5 ml to the metric teaspoon.
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Cubic Metres to Litres Converter
Convert cubic metres to litres — a thousand litres to the cubic metre.
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Litres to Cubic Metres Converter
Convert litres to cubic metres — divide by a thousand.
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Millilitres to Litres Converter
Convert millilitres to litres — divide by 1,000.
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Litres to Cups Converter
Convert litres to US cups — one litre is 4.
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Cups to Litres Converter
Convert US cups to litres — one cup is 236.
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Cubic Metres to Cubic Feet Converter
Convert cubic metres to cubic feet — one cubic metre is 35.
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Cubic Feet to Cubic Metres Converter
Convert cubic feet to cubic metres — 35.
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Millilitres to Teaspoons Converter
Convert millilitres to teaspoons — one metric teaspoon is 5 ml exactly.
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Millilitres to Tablespoons Converter
Convert millilitres to tablespoons — the metric tablespoon is 15 ml, except in Australia where it is 20 ml.
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Gallons to Cups Converter
Convert US gallons to US cups — sixteen cups to the gallon.
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Cups to Gallons Converter
Convert US cups to US gallons — divide by sixteen.
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Pints to Millilitres Converter
Convert US pints to millilitres — a US pint is 473.
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Millilitres to Pints Converter
Convert millilitres to US pints — 473.
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Litres to Fluid Ounces Converter
Convert litres to US fluid ounces — 33.
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Fluid Ounces to Litres Converter
Convert US fluid ounces to litres — 33.
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Tablespoons to Teaspoons Converter
Convert tablespoons to teaspoons — three teaspoons to the tablespoon in most of the world.
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Teaspoons to Tablespoons Converter
Convert teaspoons to tablespoons — divide by three.
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Cups to Tablespoons Converter
Convert US cups to tablespoons — sixteen tablespoons to the cup.
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Tablespoons to Cups Converter
Convert tablespoons to US cups — divide by sixteen.
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Cubic Feet to Litres Converter
Convert cubic feet to litres — one cubic foot is 28.
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Litres to Cubic Feet Converter
Convert litres to cubic feet — 28.
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mL to Cups Converter
Convert millilitres to metric cups — 250 mL to the cup.
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Pints to Cups Converter
Convert US pints to US cups — two cups to the pint.
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Cups to Pints Converter
Convert US cups to US pints — divide by two.
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Cubic Feet to Gallons Converter
Convert cubic feet to US gallons — 7.
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Gallons to Cubic Feet Converter
Convert US gallons to cubic feet — divide by 7.
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Gallons to Millilitres Converter
Convert US gallons to millilitres — one US gallon is exactly 3,785.
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Millilitres to Gallons Converter
Convert millilitres to US gallons — divide by 3,785.
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Litres to Pints Converter
Convert litres to imperial pints — one imperial pint is 568.
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Fluid Ounces to Millilitres Converter
Convert US fluid ounces to millilitres — one US fluid ounce is 29.
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Millilitres to Fluid Ounces Converter
Convert millilitres to US fluid ounces — divide by 29.
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Cubic Metres to Gallons Converter
Convert cubic metres to US gallons — 264.
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Gallons to Cubic Metres Converter
Convert US gallons to cubic metres — divide by 264.
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KG to Pounds Converter
Convert kilograms to pounds — one kilogram is 2.
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Pounds to KG Converter
Convert pounds to kilograms — one pound is exactly 0.
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Grams to Ounces Converter
Convert grams to ounces — 28.
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Ounces to Grams Converter
Convert ounces to grams — one ounce is 28.
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Stones to KG Converter
Convert stones to kilograms — one stone is 14 pounds, or 6.
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KG to Stones Converter
Convert kilograms to stones — 6.
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KG to Grams Converter
Convert kilograms to grams — a thousand to the kilogram.
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Tonnes to KG Converter
Convert metric tonnes to kilograms — a thousand kilograms to the tonne.
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Grams to KG Converter
Convert grams to kilograms — a thousand to the kilogram.
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Pounds to Stones Converter
Convert pounds to stones — fourteen pounds to the stone.
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Stones to Pounds Converter
Convert stones to pounds — multiply by fourteen.
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Ounces to Pounds Converter
Convert ounces to pounds — sixteen ounces to the pound.
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Pounds to Ounces Converter
Convert pounds to ounces — multiply by sixteen.
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MG to Grams Converter
Convert milligrams to grams — a thousand to the gram, the conversion of doses and supplements.
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Ounces to Kilograms Converter
Convert ounces to kilograms — one ounce is 28.
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Kilograms to Ounces Converter
Convert kilograms to ounces — one kilogram is 35.
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Pounds to Grams Converter
Convert pounds to grams — one pound is exactly 453.
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Grams to Pounds Converter
Convert grams to pounds — 453.
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Tonnes to Pounds Converter
Convert metric tonnes to pounds — one tonne is 2,204.
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US Tons to Kilograms Converter
Convert US short tons to kilograms — a short ton is 907.
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Kilograms to US Tons Converter
Convert kilograms to US short tons — 907.
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Pounds to Tonnes Converter
Convert pounds to metric tonnes — 2,204.
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Milligrams to Kilograms Converter
Convert milligrams to kilograms — divide by a million.
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Kilograms to Milligrams Converter
Convert kilograms to milligrams — multiply by a million.
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Tonnes to Ounces Converter
Convert metric tonnes to ounces — one tonne is 35,274 ounces.
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Ounces to Stones Converter
Convert ounces to stones — 224 ounces to the stone.
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Stones to Ounces Converter
Convert stones to ounces — multiply by 224.
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Grams to Tonnes Converter
Convert grams to metric tonnes — divide by a million.
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Tonnes to Grams Converter
Convert metric tonnes to grams — multiply by a million.
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Kilograms to Tonnes Converter
Convert kilograms to metric tonnes — divide by a thousand.
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Grams to Milligrams Converter
Convert grams to milligrams — multiply by a thousand.
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Ounces to Milligrams Converter
Convert ounces to milligrams — one avoirdupois ounce is exactly 28,349.
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Milligrams to Ounces Converter
Convert milligrams to ounces — divide by 28,349.
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Stones to Grams Converter
Convert stones to grams — one stone is exactly 6,350.
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Grams to Stones Converter
Convert grams to stones — divide by 6,350.
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Celsius to Fahrenheit Converter
Convert Celsius to Fahrenheit — multiply by 1.
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Fahrenheit to Celsius Converter
Convert Fahrenheit to Celsius — subtract 32, then multiply by 5/9.
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Celsius to Kelvin Converter
Convert Celsius to kelvin — add 273.
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Fahrenheit to Kelvin Converter
Convert Fahrenheit to kelvin — subtract 32, multiply by 5/9, then add 273.
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Kelvin to Fahrenheit Converter
Convert kelvin to Fahrenheit — subtract 273.
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Kelvin to Celsius Converter
Convert kelvin to Celsius — subtract 273.
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KM/H to MPH Converter
Convert kilometres per hour to miles per hour — multiply by 0.
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MPH to KM/H Converter
Convert miles per hour to kilometres per hour — multiply by 1.
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M/S to MPH Converter
Convert metres per second to miles per hour — the physics unit into the everyday one.
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KM/H to M/S Converter
Convert kilometres per hour to metres per second — divide by 3.
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Knots to KM/H Converter
Convert knots to kilometres per hour — one knot is 1.
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MPH to M/S Converter
Convert miles per hour to metres per second — the everyday unit into the physics one.
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Knots to MPH Converter
Convert knots to miles per hour — one knot is 1.
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M/S to KM/H Converter
Convert metres per second to kilometres per hour — multiply by 3.
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MPH to Knots Converter
Convert miles per hour to knots — a knot is 1.
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KM/H to Knots Converter
Convert kilometres per hour to knots — 1.
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MPH to Feet Per Second Converter
Convert miles per hour to feet per second — multiply by about 1.
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Feet Per Second to MPH Converter
Convert feet per second to miles per hour — divide by about 1.
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Metres per Second to Knots Converter
Convert metres per second to knots — one knot is 0.
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Knots to Metres per Second Converter
Convert knots to metres per second — multiply by 0.
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km/h to Feet per Second Converter
Convert kilometres per hour to feet per second — divide by 1.
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Feet per Second to km/h Converter
Convert feet per second to kilometres per hour — multiply by 1.
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Mach to km/h Converter
Convert Mach number to kilometres per hour — at sea level Mach 1 is about 1,225 km/h.
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km/h to Mach Converter
Convert kilometres per hour to Mach number, at the sea-level speed of sound.
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Mach to MPH Converter
Convert Mach number to miles per hour at sea level and 15 °C.
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MPH to Mach Converter
Convert miles per hour to Mach number at sea level and 15 °C.
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Knots to Feet per Second Converter
Convert knots to feet per second — one knot is 1.
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Feet per Second to Knots Converter
Convert feet per second to knots — divide by 1.
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Metres per Second to km/h Converter
Convert metres per second to kilometres per hour — multiply by 3.
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km/h to Metres per Second Converter
Convert kilometres per hour to metres per second — divide by 3.
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Metres per Second to MPH Converter
Convert metres per second to miles per hour — multiply by 2.
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MPH to Metres per Second Converter
Convert miles per hour to metres per second — divide by 2.
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Knots to Metres per Second Converter
Convert knots to metres per second — one knot is exactly 0.
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Metres per Second to Knots Converter
Convert metres per second to knots — multiply by 1.
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Feet per Second to Metres per Second Converter
Convert feet per second to metres per second — one foot per second is exactly 0.
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Metres per Second to Feet per Second Converter
Convert metres per second to feet per second — multiply by 3.
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Mach to Metres per Second Converter
Convert Mach number to metres per second at sea level and 15 °C.
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Metres per Second to Mach Converter
Convert metres per second to Mach number at sea level and 15 °C.
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Bar to PSI Converter
Convert bar to pounds per square inch — one bar is 14.
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PSI to Bar Converter
Convert pounds per square inch to bar — divide by 14.
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kPa to PSI Converter
Convert kilopascals to pounds per square inch — the SI unit into the imperial one.
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PSI to kPa Converter
Convert pounds per square inch to kilopascals — multiply by 6.
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Atmospheres to PSI Converter
Convert atmospheres to psi — one atmosphere is 14.
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Bar to Atmospheres Converter
Convert bar to standard atmospheres — one bar is 0.
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Atmospheres to Bar Converter
Convert standard atmospheres to bar — one atmosphere is exactly 1.
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kPa to Atmospheres Converter
Convert kilopascals to standard atmospheres — 101.
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PSI to Atmospheres Converter
Convert pounds per square inch to atmospheres — 14.
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Pascals to PSI Converter
Convert pascals to pounds per square inch — one psi is 6,894.
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kPa to mmHg Converter
Convert kilopascals to millimetres of mercury — the unit blood pressure is still reported in.
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mmHg to Atmospheres Converter
Convert millimetres of mercury to atmospheres — 760 mmHg is one atmosphere, the original definition.
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mmHg to kPa Converter
Convert millimetres of mercury to kilopascals — the SI reading of a blood-pressure cuff.
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Bar to kPa Converter
Convert bar to kilopascals — one bar is exactly 100 kPa.
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kPa to Bar Converter
Convert kilopascals to bar — divide by one hundred.
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Pascals to Kilopascals Converter
Convert pascals to kilopascals — divide by a thousand.
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Kilopascals to Pascals Converter
Convert kilopascals to pascals — multiply by a thousand.
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MPa to PSI Converter
Convert megapascals to pounds per square inch — one MPa is 145.
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PSI to MPa Converter
Convert pounds per square inch to megapascals — 145.
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Bar to Millibar Converter
Convert bar to millibar — multiply by a thousand.
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Millibar to Bar Converter
Convert millibar to bar — divide by a thousand.
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Atmospheres to mmHg Converter
Convert standard atmospheres to millimetres of mercury — one atmosphere is exactly 760 mmHg.
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inHg to Millibar Converter
Convert inches of mercury to millibars — the two scales on an aviation altimeter.
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Millibar to inHg Converter
Convert millibars to inches of mercury — the reverse altimeter conversion.
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PSI to inHg Converter
Convert pounds per square inch to inches of mercury — used for vacuum measurement.
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MPa to Bar Converter
Convert megapascals to bar — one MPa is exactly 10 bar.
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Bar to MPa Converter
Convert bar to megapascals — divide by 10.
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mmHg to Bar Converter
Convert millimetres of mercury to bar — divide by 750.
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Bar to mmHg Converter
Convert bar to millimetres of mercury — one bar is 750.
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PSI to Pascals Converter
Convert pounds per square inch to pascals — one psi is 6,894.
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Atmospheres to Kilopascals Converter
Convert standard atmospheres to kilopascals — one atmosphere is exactly 101.
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mmHg to PSI Converter
Convert millimetres of mercury to pounds per square inch — 51.
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PSI to mmHg Converter
Convert pounds per square inch to millimetres of mercury — multiply by 51.
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inHg to PSI Converter
Convert inches of mercury to pounds per square inch — one inHg is 0.
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kWh to Joules Converter
Convert kilowatt-hours to joules — one kWh is 3.
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Calories to Joules Converter
Convert calories to joules — one calorie is 4.
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Joules to Calories Converter
Convert joules to calories — 4.
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Kcal to kJ Converter
Convert kilocalories to kilojoules — the two numbers on every food label.
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kJ to Kcal Converter
Convert kilojoules to kilocalories — divide by 4.
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BTU to kJ Converter
Convert British thermal units to kilojoules — the heating and cooling unit into SI.
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kWh to kJ Converter
Convert kilowatt-hours to kilojoules — one kWh is exactly 3,600 kJ.
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kWh to BTU Converter
Convert kilowatt-hours to British thermal units — one kWh is 3,412 BTU.
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BTU to kWh Converter
Convert British thermal units to kilowatt-hours — 3,412 BTU to the kWh.
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Wh to kWh Converter
Convert watt-hours to kilowatt-hours — divide by one thousand.
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Kilojoules to Joules Converter
Convert kilojoules to joules — multiply by one thousand.
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Calories to Kilojoules Converter
Convert food Calories to kilojoules — one Calorie is 4.
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Kilojoules to Calories Converter
Convert kilojoules to food Calories — divide by 4.
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Joules to Kilojoules Converter
Convert joules to kilojoules — divide by a thousand.
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Calories to Kilocalories Converter
Convert small calories to kilocalories — the distinction that causes most of the confusion around food energy.
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Kilocalories to Calories Converter
Convert kilocalories to small calories — multiply by a thousand.
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kWh to Wh Converter
Convert kilowatt-hours to watt-hours — multiply by a thousand.
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Megajoules to kWh Converter
Convert megajoules to kilowatt-hours — 3.
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kWh to Megajoules Converter
Convert kilowatt-hours to megajoules — multiply by 3.
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Joules to Watt-hours Converter
Convert joules to watt-hours — 3,600 joules make a watt-hour.
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Therms to kWh Converter
Convert therms to kilowatt-hours — the conversion behind a UK or US gas bill.
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Megajoules to Kilojoules Converter
Convert megajoules to kilojoules — multiply by a thousand.
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Kilojoules to Megajoules Converter
Convert kilojoules to megajoules — divide by a thousand.
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BTU to Joules Converter
Convert British thermal units to joules — one BTU is 1,055.
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Joules to BTU Converter
Convert joules to British thermal units — divide by 1,055.
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Kilocalories to Joules Converter
Convert kilocalories — food Calories — to joules.
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Joules to Kilocalories Converter
Convert joules to kilocalories — divide by 4,184.
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Therms to Megajoules Converter
Convert therms to megajoules — one therm is 105.
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Megajoules to Therms Converter
Convert megajoules to therms — divide by 105.
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Foot-Pounds to Joules Converter
Convert foot-pounds of energy to joules — one foot-pound is 1.
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Joules to Foot-Pounds Converter
Convert joules to foot-pounds — divide by 1.
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Watt-Hours to Joules Converter
Convert watt-hours to joules — one watt-hour is exactly 3,600 J.
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Kilojoules to BTU Converter
Convert kilojoules to British thermal units — 1.
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Watt-Hours to BTU Converter
Convert watt-hours to British thermal units — one watt-hour is 3.
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KW to HP Converter
Convert kilowatts to horsepower — one kilowatt is 1.
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HP to KW Converter
Convert horsepower to kilowatts — multiply by 0.
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KW to Watts Converter
Convert kilowatts to watts — a thousand to the kilowatt.
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Watts to HP Converter
Convert watts to mechanical horsepower — 745.
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HP to Watts Converter
Convert horsepower to watts — multiply by 745.
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Watts to Kilowatts Converter
Convert watts to kilowatts — divide by one thousand.
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kW to BTU/h Converter
Convert kilowatts to BTU per hour — the heating and cooling capacity conversion.
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HP to PS Converter
Convert mechanical horsepower to metric horsepower (PS) — PS is about 1.
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PS to HP Converter
Convert metric horsepower (PS) to mechanical horsepower — multiply by 0.
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Watts to PS (Metric Horsepower) Converter
Convert watts to metric horsepower — one PS is 735.
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PS to Watts Converter
Convert metric horsepower to watts — multiply by 735.
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BTU per Hour to kW Converter
Convert BTU per hour to kilowatts — 3,412 BTU/h make a kilowatt.
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kW to Tons of Refrigeration Converter
Convert kilowatts to tons of refrigeration — one ton is 3.
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Tons of Refrigeration to kW Converter
Convert tons of refrigeration to kilowatts — multiply by 3.
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Watts to BTU per Hour Converter
Convert watts to BTU per hour — one watt is 3.
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Watts to Kilowatts Converter
Convert watts to kilowatts — divide by a thousand.
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Kilowatts to Watts Converter
Convert kilowatts to watts — multiply by a thousand.
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Megawatts to Kilowatts Converter
Convert megawatts to kilowatts — multiply by a thousand.
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Kilowatts to Megawatts Converter
Convert kilowatts to megawatts — divide by a thousand.
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Megawatts to Horsepower Converter
Convert megawatts to mechanical horsepower — one megawatt is 1,341 hp.
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Horsepower to Watts Converter
Convert mechanical horsepower to watts — one hp is 745.
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Watts to Horsepower Converter
Convert watts to mechanical horsepower — divide by 745.
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PS to Kilowatts Converter
Convert metric horsepower to kilowatts — one PS is 0.
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Kilowatts to PS Converter
Convert kilowatts to metric horsepower — multiply by 1.
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BTU per Hour to Watts Converter
Convert BTU per hour to watts — 3.
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Tons of Refrigeration to BTU per Hour Converter
Convert tons of refrigeration to BTU per hour — exactly 12,000 BTU/h to the ton.
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BTU per Hour to Tons of Refrigeration Converter
Convert BTU per hour to tons of refrigeration — divide by 12,000.
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Hours to Minutes Converter
Convert hours to minutes — sixty to the hour, including the awkward decimal ones.
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Minutes to Seconds Converter
Convert minutes to seconds — sixty to the minute.
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Days to Hours Converter
Convert days to hours — twenty-four to the day.
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Seconds to Minutes Converter
Convert seconds to minutes — sixty to the minute, with the decimal remainder.
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Hours to Seconds Converter
Convert hours to seconds — 3,600 to the hour.
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Weeks to Days Converter
Convert weeks to days — seven to the week.
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Minutes to Hours Converter
Convert minutes to hours — sixty to the hour, with the decimal payroll uses.
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Days to Weeks Converter
Convert days to weeks — seven to the week.
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Years to Days Converter
Convert years to days — using the average Gregorian year of 365.
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Months to Days Converter
Convert months to days — using the average month of 30.
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Seconds to Hours Converter
Convert seconds to hours — divide by 3,600.
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Hours to Days Converter
Convert hours to days — divide by 24.
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Minutes to Days Converter
Convert minutes to days — divide by 1,440.
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Seconds to Days Converter
Convert seconds to days — divide by 86,400.
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Weeks to Years Converter
Convert weeks to years — a year holds about 52.
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Years to Weeks Converter
Convert years to weeks — one year is 52.
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Days to Years Converter
Convert days to years — using the Gregorian average of 365.
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Hours to Years Converter
Convert hours to years — a year holds about 8,766 hours on the Gregorian average.
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Minutes to Years Converter
Convert minutes to years — a year is about 525,949 minutes on the Gregorian average.
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Seconds to Years Converter
Convert seconds to years — one year is 31,556,952 seconds on the Gregorian average.
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Days to Minutes Converter
Convert days to minutes — multiply by 1,440.
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Months to Years Converter
Convert months to years — twelve months to the year.
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Years to Months Converter
Convert years to months — multiply by twelve.
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Weeks to Months Converter
Convert weeks to months — about 4.
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Months to Weeks Converter
Convert months to weeks — about 4.
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Milliseconds to Seconds Converter
Convert milliseconds to seconds — divide by a thousand.
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Seconds to Milliseconds Converter
Convert seconds to milliseconds — multiply by a thousand.
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Weeks to Hours Converter
Convert weeks to hours — 168 hours to the week.
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Hours to Weeks Converter
Convert hours to weeks — divide by 168.
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Days to Seconds Converter
Convert days to seconds — 86,400 seconds to the day.
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Minutes to Milliseconds Converter
Convert minutes to milliseconds — multiply by 60,000.
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Days to Months Converter
Convert days to months using the average month of 30.
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Years to Hours Converter
Convert years to hours — 8,765.
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Weeks to Minutes Converter
Convert weeks to minutes — 10,080 minutes to the week.
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Minutes to Weeks Converter
Convert minutes to weeks — divide by 10,080.
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MB to GB Converter
Convert megabytes to gigabytes — 1,000 MB to the GB in decimal units, which is how storage is sold.
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GB to TB Converter
Convert gigabytes to terabytes — 1,000 GB to the terabyte in the decimal units storage is sold in.
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GB to MB Converter
Convert gigabytes to megabytes — a thousand to the gigabyte in the decimal units storage is sold in.
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TB to GB Converter
Convert terabytes to gigabytes — a thousand gigabytes to the terabyte in decimal units.
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KB to MB Converter
Convert kilobytes to megabytes — a thousand to the megabyte in decimal units.
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MB to KB Converter
Convert megabytes to kilobytes — a thousand to the megabyte.
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GB to GiB Converter
Convert decimal gigabytes to binary gibibytes — the reason a 1 TB drive shows as 931 GB.
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GB to KB Converter
Convert gigabytes to kilobytes — one million kilobytes to the gigabyte, on the decimal definition.
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MB to TB Converter
Convert megabytes to terabytes — one million megabytes make a terabyte.
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KB to GB Converter
Convert kilobytes to gigabytes — a million kilobytes to the gigabyte.
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Bits to Bytes Converter
Convert bits to bytes — eight bits to the byte.
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Bytes to Bits Converter
Convert bytes to bits — multiply by eight.
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GiB to GB Converter
Convert gibibytes to gigabytes — the binary unit to the decimal one.
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MB to MiB Converter
Convert megabytes to mebibytes — the decimal unit to the binary one.
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KiB to KB Converter
Convert kibibytes to kilobytes — 1,024 bytes against 1,000.
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KB to KiB Converter
Convert kilobytes to kibibytes — 1,000 bytes against 1,024.
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GB to TiB Converter
Convert gigabytes to tebibytes — decimal to binary at the terabyte scale.
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TiB to TB Converter
Convert tebibytes to terabytes — the conversion behind "why is my drive smaller than advertised".
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TB to MB Converter
Convert terabytes to megabytes — a million megabytes to the terabyte.
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MiB to MB Converter
Convert mebibytes to megabytes — 1,048,576 bytes against 1,000,000.
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Bytes to KB Converter
Convert bytes to kilobytes — a thousand bytes to the kilobyte on the decimal definition.
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MB to Bytes Converter
Convert megabytes to bytes — a million bytes to the megabyte on the decimal definition.
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Bytes to MB Converter
Convert bytes to megabytes — divide by a million.
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KiB to Bytes Converter
Convert kibibytes to bytes — exactly 1,024 bytes to the kibibyte.
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Bytes to KiB Converter
Convert bytes to kibibytes — divide by 1,024.
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GiB to Bytes Converter
Convert gibibytes to bytes — 1,073,741,824 bytes to the gibibyte.
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Bytes to GiB Converter
Convert bytes to gibibytes — divide by 1,073,741,824.
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TiB to GiB Converter
Convert tebibytes to gibibytes — exactly 1,024 gibibytes to the tebibyte.
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GiB to TiB Converter
Convert gibibytes to tebibytes — divide by 1,024.
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MiB to KiB Converter
Convert mebibytes to kibibytes — exactly 1,024 kibibytes to the mebibyte.
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KiB to MiB Converter
Convert kibibytes to mebibytes — divide by 1,024.
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Degrees to Radians Converter
Convert degrees to radians — multiply by π and divide by 180.
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Radians to Degrees Converter
Convert radians to degrees — multiply by 180 and divide by π.
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Degrees to Gradians Converter
Convert degrees to gradians — 400 gradians to a full turn instead of 360.
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Gradians to Degrees Converter
Convert gradians to degrees — multiply by nine tenths.
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Degrees to Arcminutes Converter
Convert degrees to arcminutes — sixty arcminutes to the degree.
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Arcminutes to Degrees Converter
Convert arcminutes to degrees — divide by sixty.
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Degrees to Turns Converter
Convert degrees to full turns — 360 degrees to the turn.
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Turns to Degrees Converter
Convert full turns to degrees — multiply by 360.
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Radians to Gradians Converter
Convert radians to gradians — 200 gradians to π radians.
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Gradians to Radians Converter
Convert gradians to radians — 100 gradians is π/2.
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Arcseconds to Degrees Converter
Convert arcseconds to degrees — 3,600 arcseconds to the degree.
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Degrees to Arcseconds Converter
Convert degrees to arcseconds — multiply by 3,600.
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Radians to Arcminutes Converter
Convert radians to arcminutes — one radian is 3,437.
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Arcminutes to Radians Converter
Convert arcminutes to radians — divide by 3,437.
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Turns to Radians Converter
Convert full turns to radians — one turn is exactly 2π radians.
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Radians to Turns Converter
Convert radians to full turns — divide by 2π.
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NATO Mils to Degrees Converter
Convert NATO mils to degrees — 6,400 mils to a full turn.
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Degrees to NATO Mils Converter
Convert degrees to NATO mils — multiply by 17.
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kg/m³ to g/cm³ Converter
Convert kilograms per cubic metre to grams per cubic centimetre — divide by a thousand.
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g/cm³ to kg/m³ Converter
Convert grams per cubic centimetre to kilograms per cubic metre — multiply by a thousand.
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lb/ft³ to kg/m³ Converter
Convert pounds per cubic foot to kilograms per cubic metre — the imperial-to-SI density conversion.
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kg/m³ to g/cm³ Converter
Convert kilograms per cubic metre to grams per cubic centimetre — divide by a thousand.
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g/cm³ to kg/m³ Converter
Convert grams per cubic centimetre to kilograms per cubic metre — multiply by a thousand.
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lb/ft³ to kg/m³ Converter
Convert pounds per cubic foot to kilograms per cubic metre — the timber and concrete conversion.
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kg/m³ to lb/ft³ Converter
Convert kilograms per cubic metre to pounds per cubic foot — divide by 16.
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g/mL to kg/m³ Converter
Convert grams per millilitre to kilograms per cubic metre — multiply by a thousand.
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kg/L to g/cm³ Converter
Convert kilograms per litre to grams per cubic centimetre — they are numerically identical.
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g/cm³ to lb/ft³ Converter
Convert grams per cubic centimetre to pounds per cubic foot — the metric-to-imperial density conversion.
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lb/ft³ to g/cm³ Converter
Convert pounds per cubic foot to grams per cubic centimetre — divide by 62.
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Tonnes per Cubic Metre to kg/m³ Converter
Convert tonnes per cubic metre to kilograms per cubic metre — multiply by a thousand.
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lb/in³ to g/cm³ Converter
Convert pounds per cubic inch to grams per cubic centimetre — one lb/in³ is 27.
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g/cm³ to lb/in³ Converter
Convert grams per cubic centimetre to pounds per cubic inch — divide by 27.
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oz/in³ to g/cm³ Converter
Convert ounces per cubic inch to grams per cubic centimetre — one oz/in³ is 1.
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kg/m³ to Tonnes per Cubic Metre Converter
Convert kilograms per cubic metre to tonnes per cubic metre — divide by a thousand.
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kg/m³ to kg/L Converter
Convert kilograms per cubic metre to kilograms per litre — divide by a thousand.
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MPG to L/100km Converter
Convert miles per gallon to litres per 100 km — and note these run in opposite directions, so a higher mpg means a lower L/100km.
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L/100km to MPG Converter
Convert litres per 100 km to miles per gallon — the European figure into the British one.
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US MPG to L/100km Converter
Convert US miles per gallon to litres per 100 km — note the US gallon is smaller than the imperial one.
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L/100km to US MPG Converter
Convert litres per 100 km to US miles per gallon.
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L/100km to km/L Converter
Convert litres per 100 km to kilometres per litre — the two metric fuel-economy conventions.
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km/L to L/100km Converter
Convert kilometres per litre to litres per 100 km.
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UK MPG to US MPG Converter
Convert imperial miles per gallon to US miles per gallon — the same car reads about 20% lower in the US.
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US MPG to UK MPG Converter
Convert US miles per gallon to imperial — the same car reads about 20% higher.
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About these calculators
These converters use exact SI definitions (BIPM SI Brochure, NIST SP 811). Nothing here depends on tax years or regulations, so a result in United Kingdom is the same result anywhere; only the spelling and the default units follow local practice.