Watts to Kilowatts Converter
Convert watts to kilowatts — divide by one thousand. Results update as you type; exact factors shown.
One watt is 0.001 kilowatts — see the exact factor, not a rounded rule of thumb.
How the watts to kilowatts converter works
Power converts through the watt. Mechanical horsepower is 550 ft·lbf/s = 745.6999 W; metric horsepower (PS, used in European car specs) is 735.4988 W. Air-conditioner capacities are quoted in kW, BTU/h (1 W = 3.412 BTU/h) or tons of refrigeration (3.517 kW).
The UK is metric for most trade and science but keeps miles, pints, stone and mpg (with the imperial gallon) in daily life.
Common power conversions
| From | To | Units |
|---|---|---|
| 100 W | 0.1 kW | watts to kilowatts |
| 250 W | 0.25 kW | watts to kilowatts |
| 500 W | 0.5 kW | watts to kilowatts |
| 750 W | 0.75 kW | watts to kilowatts |
| 1,000 W | 1 kW | watts to kilowatts |
| 1,500 W | 1.5 kW | watts to kilowatts |
| 2,000 W | 2 kW | watts to kilowatts |
| 2,400 W | 2.4 kW | watts to kilowatts |
| 3,000 W | 3 kW | watts to kilowatts |
| 5,000 W | 5 kW | watts to kilowatts |
| 7,500 W | 7.5 kW | watts to kilowatts |
| 10,000 W | 10 kW | watts to kilowatts |
Units in this converter and their exact factors
| Unit | Symbol | One unit in watts |
|---|---|---|
| watt | W | 1 watt |
| kilowatt | kW | 1,000 watt |
| megawatt | MW | 1,000,000 watt |
| horsepower (mechanical) | hp | 745.6998715823 watt |
| metric horsepower (PS) | PS | 735.49875 watt |
| BTU per hour | BTU/h | 0.29307107 watt |
| ton of refrigeration | TR | 3,516.8528421 watt |
FAQFrequently asked questions about power conversion
How many watts in a kilowatt?
Exactly 1,000.
What is a 2,400 W kettle in kW?
2.4 kW — close to the limit of a UK 13 A socket.
What is the difference between kW and kWh?
kW is power, the rate of use; kWh is energy, power multiplied by time. A 2 kW heater run for 3 hours uses 6 kWh.
How many watts does a home use?
Typically 300 to 1,000 W on average, spiking far higher when an oven or kettle runs.
What size solar system is 6.6 kW?
6,600 watts of panel capacity — a common Australian residential size.
Where these figures come from
- BIPM — The International System of Units (SI Brochure, 9th edition) — definitions of the base and derived units.
- NIST Special Publication 811 — Guide for the Use of the International System of Units — the exact conversion factors used here.
- National Physical Laboratory (NPL) — United Kingdom's national measurement authority.
Last checked: September 2026. Conversion factors are fixed by definition and do not change with tax years or regulations.