Watt-hours to Kilowatt-hours formula
kilowatt-hours = watt-hours × 0.001
Multiply the number of watt-hours by 0.001 to get kilowatt-hours. To go the other way, multiply by 1,000 instead, or use the kwh to wh converter.
Watt-hours to Kilowatt-hours conversion table
Common wh to kwh values, rounded for reading. The converter above keeps full precision.
| Watt-hours | Kilowatt-hours |
|---|---|
| 1 Wh | 0.001 kWh |
| 2 Wh | 0.002 kWh |
| 3 Wh | 0.003 kWh |
| 4 Wh | 0.004 kWh |
| 5 Wh | 0.005 kWh |
| 10 Wh | 0.01 kWh |
| 15 Wh | 0.015 kWh |
| 20 Wh | 0.02 kWh |
| 25 Wh | 0.025 kWh |
| 50 Wh | 0.05 kWh |
| 75 Wh | 0.075 kWh |
| 100 Wh | 0.1 kWh |
| 250 Wh | 0.25 kWh |
| 500 Wh | 0.5 kWh |
| 1,000 Wh | 1 kWh |
Worked example
To convert 10 Wh to kilowatt-hours, multiply by 0.001: the result is 0.01 kWh. A nutritional Calorie is a kilocalorie, equal to 4,184 joules. The smaller scientific calorie equals 4.184 joules.
Frequently asked questions
How many kilowatt-hours are in a watt-hour?
One watt-hour equals 0.001 kilowatt-hours (1 Wh = 0.001 kWh).
What is 10 watt-hours in kilowatt-hours?
10 Wh converts to 0.01 kWh. Enter any other value in the converter above to see it recalculated instantly.
How do I convert kilowatt-hours back to watt-hours?
Reverse the calculation: one kilowatt-hour equals 1,000 watt-hours. You can also swap the units in the converter or open the kwh to wh page.
Related energy conversions
Need a different pair? Open the full energy converter to choose any two units.