Convert watts to kilowatts instantly. Enter a value below, or use the formula and reference table further down the page.
In practice
Watts to kilowatts divides by 1,000. It is the step that helps you read appliance ratings against your electricity bill: a 2,000 W kettle is 2 kW and running it for an hour uses 2 kWh. Typical figures give scale: a phone charger is 5 to 20 W, a laptop 50 to 100 W, a microwave about 1,000 W and an electric oven 2,000 to 3,000 W. When the label shows watts, divide by 1,000 and multiply by hours to estimate energy cost.
How to convert watts to kilowatts
Multiply the value by 0.001.
kW = W × 0.001Example: 10 W = 0.01 kW.
Watts to Kilowatts conversion table
| Watts (W) | Kilowatts (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 |
| 20 W | 0.02 kW |
| 25 W | 0.025 kW |
| 50 W | 0.05 kW |
| 100 W | 0.1 kW |
Frequently asked questions
How many kilowatts is 1 watt?
1 watt equals 0.001 kilowatts.
What is the formula to convert W to kW?
To convert W to kW, multiply the value by 0.001. The full formula is: kW = W × 0.001.
How do I convert kilowatts back to watts?
Use the same calculator above and type your value into the kilowatts field instead — it converts in both directions. Or use the reverse formula: W = kW ÷ 0.001.
Is the W to kW conversion exact?
The conversion factor used here (0.001) is the standard internationally defined value. Results on this page are rounded to four decimal places for readability.