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