Kilowatt-hours to watt-hours
Type a value in kilowatt-hours to see it in watt-hours straight away, or type in the second box to convert back.
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How to use it
- Type the value in the kilowatt-hours box.
- Read the result in watt-hours as you type, and pick the precision you need.
- Swap the direction to convert back, or copy the result.
How it is calculated
Wh = kWh × 1,000
Multiply the value in kilowatt-hours by 1,000 to get watt-hours.
Example
To convert 25 kWh to watt-hours: 25 × 1,000 = 25,000 Wh.
Conversion table
| Kilowatt-hours (kWh) | Watt-hours (Wh) |
|---|---|
| 1 | 1,000 |
| 2 | 2,000 |
| 3 | 3,000 |
| 5 | 5,000 |
| 10 | 10,000 |
| 20 | 20,000 |
| 25 | 25,000 |
| 50 | 50,000 |
| 100 | 100,000 |
| 250 | 250,000 |
| 500 | 500,000 |
| 1,000 | 1,000,000 |
About the units
- Kilowatt-hour
- The energy used by a 1000 watt device in one hour, exactly 3.6 million joules. Electricity bills are charged in this unit.
- Watt-hour
- The energy used by a one watt device in one hour, exactly 3600 joules. Common for battery and power bank capacity.
Limits and caveats
- Results are rounded for display and computed with the browser's floating point precision (about 15 significant digits).
- Both unit factors are exact by their official definitions.
Questions about this tool
How many watt-hours are in one kilowatt-hour?
1 kWh = 1,000 Wh exactly.
How do I convert kilowatt-hours to watt-hours?
Use Wh = kWh × 1,000. For example, 25 kWh = 25,000 Wh.
How many kilowatt-hours are in one watt-hour?
1 Wh = 0.001 kWh.
Which calorie do these converters use?
The thermochemical calorie, exactly 4.184 joules, the factor many countries use to turn kcal into kJ on food labels. The International Table calorie is 4.1868 joules, less than 0.07% larger.
What is the difference between kW and kWh?
A kilowatt is a unit of power, the rate of using energy, while a kilowatt-hour is an amount of energy. A 2 kW heater running for three hours uses 6 kWh.