Convert Watt Hour to Kilowatt Hour
Use this free converter to change watt hours (Wh) into kilowatt hours (kWh). Watt hour and kilowatt hour both measure energy. As a quick reference, 1 Wh equals 0.001 kWh, and 1 kWh equals 1000 Wh.
Free · runs in your browser · no sign-up
Kilowatt Hour (kWh)
0.001
1 Wh = 0.001 kWh
Energy conversion table
| Watt Hour | Kilowatt Hour |
|---|---|
| 0.01 | 0.00001 |
| 0.1 | 0.0001 |
| 0.5 | 0.0005 |
| 1 | 0.001 |
| 2 | 0.002 |
| 3 | 0.003 |
| 5 | 0.005 |
| 10 | 0.01 |
| 20 | 0.02 |
| 25 | 0.025 |
| 50 | 0.05 |
| 100 | 0.1 |
| 1,000 | 1 |
How to convert Watt Hour to Kilowatt Hour
Multiply the watt hour value by 0.001 to get kilowatt hours.
- Enter the number of watt hours you want to convert.
- The converter instantly shows the equivalent value in kilowatt hours.
- Worked example: 15 Wh × 0.001 = 0.015 kWh.
- Use the swap button to reverse the conversion (kilowatt hour to watt hour).
About these units
Watt Hour (Wh)
- Definition
- A watt-hour (Wh) is the energy of one watt sustained for one hour, equal to 3,600 joules.
- History
- It arose with the electricity industry as a practical billing unit.
- Current use
- Watt-hours rate batteries and small energy stores.
Kilowatt Hour (kWh)
- Definition
- A kilowatt-hour (kWh) is 1,000 watt-hours, the standard unit on electricity bills.
- History
- It became the billing unit as household electricity spread.
- Current use
- Kilowatt-hours measure home electricity use and EV battery capacity.
Frequently asked questions
How many kilowatt hours are in a watt hour?
There are 0.001 kWh in 1 Wh. To convert, multiply the number of watt hours by 0.001.
How do I convert watt hours to kilowatt hours?
Multiply the watt hour value by 0.001 to get kilowatt hours. For example, 10 Wh = 0.01 kWh.
Is this watt hour-to-kilowatt hour converter free?
Yes. This converter is completely free, runs entirely in your browser, and requires no sign-up. Your inputs never leave your device.
Convert Watt Hour to other energy units
| Unit | 1 Watt Hour equals |
|---|---|
| Joule (J) | 3600 J |
| Kilojoule (kJ) | 3.6 kJ |
| Calorie (cal) | 860.42065 cal |
| Kilocalorie (kcal) | 0.86042065 kcal |
| Kilowatt Hour (kWh) | 0.001 kWh |
| Electronvolt (eV) | 2.2469e+22 eV |
| British Thermal Unit (BTU) | 3.4121416 BTU |
| Foot-Pound (ft·lb) | 2655.2237 ft·lb |