Kilowatt-hours to Watt-hours (kWh to Wh) Converter
1 kilowatt-hour equals 1000 watt-hours (Wh) — multiply kilowatt-hours by 1000 to convert. The prefix kilo means one thousand, so a kilowatt-hour is simply 1,000 watt-hours.
The formula
To convert kilowatt-hours to watt-hours, multiply by the exact factor:
Wh = kWh × 1000
For example, 2.5 kWh × 1000 = 2500 Wh. To reverse it, divide by 1000 (or multiply by 0.001).
Conversion table
| Kilowatt-hours (kWh) | Watt-hours (Wh) |
|---|---|
| 1 | 1000 |
| 2 | 2000 |
| 3 | 3000 |
| 5 | 5000 |
| 10 | 10000 |
| 25 | 25000 |
| 50 | 50000 |
| 100 | 100000 |
| 500 | 500000 |
| 1000 | 1000000 |
How to convert online
- Type the number of kilowatt-hours in the first box.
- Read the watt-hour result instantly in the second box.
- Enter a Wh value to convert back the other way.
Use the Kilowatt-hour to Watt-hour Converter — free and instant in your browser.
Where this conversion is used
Kilowatt-hours to watt-hours is everyday work for solar and battery sizing, where panel and battery capacities are often quoted in Wh while home consumption is billed in kWh. It also helps compare device power banks, EV batteries and appliance ratings that mix the two units.
FAQ
How many watt-hours are in a kilowatt-hour?
One kilowatt-hour equals 1000 watt-hours. So 10 kWh is 10,000 Wh.
What is the formula to convert kWh to Wh?
Multiply the kilowatt-hour value by 1000: Wh = kWh × 1000.
How do I convert watt-hours back to kilowatt-hours?
Divide by 1000, or multiply by 0.001. For example, 10,000 Wh ÷ 1000 = 10 kWh.
Is the conversion exact?
Yes. The kilo prefix is exactly 1,000, so the conversion has no rounding error.
Related converters
- Watt-hour to Kilowatt-hour Converter
- Kilowatt-hour to Joule Converter
- Kilowatt-hour to Kilojoule Converter
- Kilowatt-hour to Kilocalorie Converter
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