watt-hours to kWh Converter
Convert watt-hours to kWh instantly with a reference conversion table.
| watt-hours | kWh |
|---|
How to convert watt-hours to kWh
Enter your value
Type the number of watt-hours you want to convert into the left box. The result in kwh appears instantly in the right box. You can also type into the right box to convert in the other direction.
Use the swap button
Click the ⇄ Swap button to reverse the conversion — kWh to watt-hours. Your current value carries across so you don't have to re-enter anything.
About watt-hours and kWh
watt-hours and kWh are common energy measurements.
1 kWh = 1,000 Wh. A typical UK household appliance breakdown: fridge ~130 kWh/year, washing machine ~150 kWh/year, electric shower (daily 7-minute use) ~750 kWh/year. The shower is often the largest single appliance energy cost.
| watt-hours | kWh |
|---|---|
| 1 | 0.001 |
| 10 | 0.01 |
| 100 | 0.1 |
| 250 | 0.25 |
| 500 | 0.5 |
| 1000 | 1 |
Frequently asked questions
How do I convert watt-hours to kWh?
To convert watt-hours to kWh, multiply by 0.001. Or use the calculator above for instant results.
How many kWh are in 1 watt-hours?
1 watt-hours equals 0.001 kWh.
Is the watt-hours to kWh converter free?
Yes, the watt-hours to kWh converter is completely free with no sign-up required, no downloads, and it works offline once the page has loaded.