Watt-hours to Kilowatt-hours
Convert watt-hours to kilowatt-hours (Wh to kWh). 1 Wh = 0.001 kWh. Use the calculator, formula and conversion table.
How to convert watt-hours to kilowatt-hours
Multiply the amount in watt-hours by 0.001 to get kilowatt-hours. The displayed factor and results are rounded to 12 significant digits.
kWh = Wh × 0.001Worked example
1 Wh = 0.001 kWh. Change the amount in the calculator above to use your own value.
Units and assumptions
A watt-hour is 3,600 joules. Calories use the thermochemical definition (4.184 J); BTU uses the International Table definition.
Calculator results use floating-point arithmetic and are rounded for display. The reference table below uses up to 12 significant digits.
Watt-hours to Kilowatt-hours table
| Watt-hours (Wh) | Kilowatt-hours (kWh) |
|---|---|
| 0 | 0 |
| 1 | 0.001 |
| 5 | 0.005 |
| 10 | 0.01 |
| 25 | 0.025 |
| 100 | 0.1 |
| 1,000 | 1 |
About this conversion
What is the formula for watt-hours to kilowatt-hours?
kWh = Wh × 0.001. Multiply the amount in watt-hours by 0.001 to get kilowatt-hours. The displayed factor and results are rounded to 12 significant digits.
How do I convert back to watt-hours?
Use the kilowatt-hours to watt-hours calculator to reverse this conversion. You can also use Swap units in the calculator above.
Can I use a different pair of units?
Choose another unit in the calculator, or open the energy converter to browse all supported pairs.