Watt-hours to kWh Converter
Convert watt-hours (Wh) to kilowatt-hours (kWh) as you type — 1 Wh = 0.001 kWh. Switch units, change the precision or copy the result.
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How to use this tool
Steps for using the Unit Converter.
- Enter a value in From — watt-hours are already selected.
- The result in kilowatt-hours appears instantly. Change either unit to convert to anything else in energy.
- Use the swap button for the reverse conversion, and set the decimal places you need.
- Turn on Show formula to see the calculation, then copy or share the result.
Example
1 Wh to kWh
1 WhkWh = 1 ÷ 1000 = 0.001 kWhCommon use cases
- Food energy on nutrition labels (kJ and kcal).
- Electricity use and battery capacity in Wh and kWh.
- Heating and cooling loads in BTU.
Watt-hours to kWh conversion table
| Watt-hour (Wh) | Kilowatt-hour (kWh) |
|---|---|
| 0.1 Wh | 0.0001 kWh |
| 0.5 Wh | 0.0005 kWh |
| 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 |
| Watt-hour (Wh) | Kilowatt-hour (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 |
Values rounded to 6 decimal places.
Related conversions
The units
- Watt-hour (Wh)
- 1 W for 1 hour = 3,600 J. Part of the Metric system.
- Kilowatt-hour (kWh)
- 1,000 Wh = 3.6 MJ. Part of the Metric system.
How to convert watt-hours to kilowatt-hours
Battery capacities (power banks, laptops, e-bikes) are given in Wh; electricity is billed per kWh.
To convert watt-hours to kilowatt-hours, use kWh = Wh ÷ 1000. One watt-hour equals 0.001 kilowatt-hours, and one kilowatt-hour equals 1,000 watt-hours.
Watt-hour (Wh): 1 W for 1 hour = 3,600 J. Kilowatt-hour (kWh): 1,000 Wh = 3.6 MJ.
All energy units are on the energy converter.
Limitations
- Results are rounded to the decimal places you choose; the calculation itself keeps full precision.
Frequently asked questions
How many kilowatt-hours are in a watt-hour?
1 Wh = 0.001 kWh. Multiply watt-hours by 0.001 (or use kWh = Wh ÷ 1000).
How do I convert watt-hours to kilowatt-hours?
Use kWh = Wh ÷ 1000. For example, 1 Wh = 0.001 kWh and 10 Wh = 0.01 kWh.
Is a food Calorie the same as a calorie?
No. A food Calorie (capital C) is a kilocalorie, 1,000 small calories or 4.184 kJ.
How many joules are in a kWh?
3,600,000 J (3.6 MJ).