⚡ Energy
watt-hours to kWh Converter
Convert watt-hours to kWh instantly with a reference conversion table.
Quick answer: To convert watt-hours to kWh, multiply by 0.001. For example, 1 watt-hours = 0.001 kWh. Use the calculator below for any value.
watt-hours to kWh
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Common conversions
| watt-hours | kWh |
|---|
Formula:
How to convert watt-hours to kWh
1
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.
2
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.
3
About watt-hours and kWh
watt-hours and kWh are common energy measurements.
💡 Did you know?
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.
📊 Common conversions at a glance
| watt-hours | kWh |
|---|---|
| 1 | 0.001 |
| 10 | 0.01 |
| 100 | 0.1 |
| 250 | 0.25 |
| 500 | 0.5 |
| 1000 | 1 |
Reviewed for 2026. watt-hours ↔ kWh conversion factor verified against published reference data. Built by a UK-based qualified primary teacher and FA Level 2 coach as part of 247QuickTools' free utility-tools project.