Watts to kW
Compare appliance power ratings. Energy consumption also requires a duration.
Edit either value. Use a decimal point; commas group thousands. Rounding affects display only.
How to convert watts to kilowatts
Compare appliance power ratings. Energy consumption also requires a duration.
Formula coefficients shown rounded. Calculations use the stored factors before display rounding.
A worked example
For 10 W, the result is approximately 0.01 kW. To go the other way, edit the result above or swap the units.
Mechanical horsepower (hp), metric horsepower (PS) and electric horsepower are distinct. Power in kW is not energy in kWh.
Where the numbers come from
Factors follow NIST conversion references and documented unit definitions. Read our accuracy and rounding notes.
The table and method describe this page’s original pair. Changing units above does not change this reference section.
| Watts (W) | Kilowatts (kW) |
|---|---|
| 1 | 0.001 |
| 2 | 0.002 |
| 5 | 0.005 |
| 10 | 0.01 |
| 20 | 0.02 |
| 25 | 0.025 |
| 50 | 0.05 |
| 100 | 0.1 |
| 500 | 0.5 |
| 1000 | 1 |