Vehicles & Automotive Calculators — United Kingdom
Fuel, tyres and engine figures. The arithmetic is universal; fuel prices are yours to enter.
Fuel & running costs
Trip Fuel Cost Calculator
What a journey costs in fuel, split between passengers, with the return trip included.
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Car Cost Per Kilometre Calculator
The real cost of running a car per kilometre, including the depreciation people leave out.
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Service Cost Per Kilometre Calculator
What routine servicing costs per kilometre and per year — from the service interval, the cost of a service and the kilometres you drive — with the major-service cycle folded in, the next service due, and the monthly amount to set aside.
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Fleet Utilisation Calculator
How well a fleet is used — the share of available vehicle-days actually driven, the cost of every vehicle-day whether used or idle, the cost of the idle days, and how many vehicles the same work would need at a target utilisation.
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EV Range Calculator
How far an electric car goes on a charge from its battery size and energy consumption — city, mixed, motorway and winter — with the range left at a 20% reserve.
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MPGe Converter
Convert electric-vehicle efficiency between kWh per 100 km, Wh per km, kilometres per kWh, miles per kWh and MPGe — the figures different countries and car makers quote.
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Tyres & wheels
Tyre Size Calculator
Compare two tyre sizes — diameter, circumference, and the speedometer error a change introduces.
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Tyre Cost per Kilometre Calculator
The running cost of tyres per kilometre and per year from the price of a set, fitting and balancing, and how many kilometres they last — so a dearer tyre that lasts longer can be compared with a cheaper one.
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Engine & performance
Engine Displacement Calculator
Engine capacity from bore, stroke and cylinder count — plus the bore-to-stroke ratio that shapes its character.
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Power-to-Weight Ratio Calculator
Power-to-weight ratio in the several forms it is quoted in, and a rough acceleration estimate.
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Towing Capacity Calculator
Whether a load is legal against your vehicle's limits — payload, tow ball weight and combined mass.
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Stopping Distance Calculator
How far a car travels before it stops — the distance covered while the driver reacts plus the braking distance — for any speed, reaction time and road surface.
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Crash Impact Force Calculator
The average force and g-load in a crash from the speed, the mass of the vehicle or occupant, and the distance over which it stops — and the fall height it is equivalent to.
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About these calculators
Fuel consumption figures from a manufacturer are laboratory results and are routinely optimistic against real driving. Use your own measured consumption where you have it — brim the tank, drive, brim again, and divide.