Convert Watt-hour to Kilowatt-hour
1 watt-hour = 0.001 kilowatt-hour (kWh). For example, 10 watt-hour = 0.01 kilowatt-hour and 100 watt-hour = 0.1 kilowatt-hour. Type any value below to convert watt-hour to kilowatt-hour both ways — it runs entirely in your browser.
Watt-hour to Kilowatt-hour conversion formula
To convert watt-hour to kilowatt-hour, multiply by 0.001:
kilowatt-hour = watt-hour × 0.001
Going the other way, 1 kilowatt-hour = 1,000 watt-hour, so
watt-hour = kilowatt-hour × 1,000.
Watt-hour to Kilowatt-hour — worked examples
| Watt-hour | Kilowatt-hour |
|---|---|
| 1 Wh | 0.001 kWh |
| 2 Wh | 0.002 kWh |
| 3 Wh | 0.003 kWh |
| 5 Wh | 0.005 kWh |
| 10 Wh | 0.01 kWh |
| 25 Wh | 0.025 kWh |
| 50 Wh | 0.05 kWh |
| 100 Wh | 0.1 kWh |
Watt-hour ↔ Kilowatt-hour reference table
| Watt-hour → Kilowatt-hour | Kilowatt-hour → Watt-hour |
|---|---|
| 1 Wh = 0.001 kWh | 1 kWh = 1,000 Wh |
| 2 Wh = 0.002 kWh | 2 kWh = 2,000 Wh |
| 5 Wh = 0.005 kWh | 5 kWh = 5,000 Wh |
| 10 Wh = 0.01 kWh | 10 kWh = 10,000 Wh |
| 20 Wh = 0.02 kWh | 20 kWh = 20,000 Wh |
| 50 Wh = 0.05 kWh | 50 kWh = 50,000 Wh |
| 100 Wh = 0.1 kWh | 100 kWh = 100,000 Wh |
| 250 Wh = 0.25 kWh | 250 kWh = 250,000 Wh |
| 500 Wh = 0.5 kWh | 500 kWh = 500,000 Wh |
| 1000 Wh = 1 kWh | 1000 kWh = 1,000,000 Wh |
About watt-hour and kilowatt-hour
Watt-hour: A watt-hour is the energy of one watt sustained for one hour — exactly 3,600 joules. Commonly used to rate battery capacity.
Kilowatt-hour: A kilowatt-hour is 1,000 watt-hours — exactly 3,600,000 joules (3.6 MJ). It is the "unit" your electricity meter bills.
Frequently asked questions
- How many kilowatt-hour are in 1 watt-hour?
- 1 watt-hour = 0.001 kilowatt-hour (kWh).
- How do I convert watt-hour to kilowatt-hour?
- Multiply the number of watt-hour by 0.001. For example, 10 watt-hour = 10 × 0.001 = 0.01 kilowatt-hour.
- How many watt-hour are in 1 kilowatt-hour?
- 1 kilowatt-hour = 1,000 watt-hour.
- Which is bigger, watt-hour or kilowatt-hour?
- 1 kilowatt-hour equals 1,000 watt-hour, so a kilowatt-hour is the larger unit.