Watts to Kilowatts Converter
Convert watts (W) to kilowatts (kW) as you type — 1 W = 0.001 kW. Switch units, change the precision or copy the result.
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How to use this tool
Steps for using the Unit Converter.
- Enter a value in From — watts are already selected.
- The result in kilowatts appears instantly. Change either unit to convert to anything else in power.
- Use the swap button for the reverse conversion, and set the decimal places you need.
- Turn on Show formula to see the calculation, then copy or share the result.
Example
1 W to kW
1 WkW = 1 ÷ 1000 = 0.001 kWCommon use cases
- Engine and motor ratings in kW and hp.
- Appliance and solar panel ratings in W and kW.
- Air-conditioner capacity in BTU/h.
Watts to Kilowatts conversion table
| Watt (W) | Kilowatt (kW) |
|---|---|
| 0.1 W | 0.0001 kW |
| 0.5 W | 0.0005 kW |
| 1 W | 0.001 kW |
| 2 W | 0.002 kW |
| 3 W | 0.003 kW |
| 4 W | 0.004 kW |
| 5 W | 0.005 kW |
| 10 W | 0.01 kW |
| 15 W | 0.015 kW |
| Watt (W) | Kilowatt (kW) |
|---|---|
| 20 W | 0.02 kW |
| 25 W | 0.025 kW |
| 50 W | 0.05 kW |
| 75 W | 0.075 kW |
| 100 W | 0.1 kW |
| 250 W | 0.25 kW |
| 500 W | 0.5 kW |
| 1,000 W | 1 kW |
Values rounded to 6 decimal places.
Related conversions
The units
- Watt (W)
- 1 J/s, the SI unit of power. Part of the SI system.
- Kilowatt (kW)
- 1,000 W. Part of the Metric system.
How to convert watts to kilowatts
Appliance ratings, solar panels and electricity tariffs: bills are calculated in kilowatt-hours, so kilowatts are the natural unit.
To convert watts to kilowatts, use kW = W ÷ 1000. One watt equals 0.001 kilowatts, and one kilowatt equals 1,000 watts.
Watt (W): 1 J/s, the SI unit of power. Kilowatt (kW): 1,000 W.
For the opposite direction, use the Kilowatts to watts converter. All power units are on the power converter.
Limitations
- Results are rounded to the decimal places you choose; the calculation itself keeps full precision.
Frequently asked questions
How many kilowatts are in a watt?
1 W = 0.001 kW. Multiply watts by 0.001 (or use kW = W ÷ 1000).
How do I convert watts to kilowatts?
Use kW = W ÷ 1000. For example, 1 W = 0.001 kW and 10 W = 0.01 kW.
How many watts is one horsepower?
Mechanical horsepower is 745.7 W; metric horsepower (PS) is 735.5 W.
Is electrical power different from mechanical power?
No — both are measured in watts. Electrical power is volts × amps (for DC), but the unit is the same.