Unit converter
Watts to kWh calculator
Power tells you how fast energy is being used. Time turns that power into energy.
Watts and kWh are not the same thing
A watt is a unit of power. A kilowatt-hour is a unit of energy. Electricity meters and bills usually track energy because it captures both how much power a device draws and how long it runs.
Common conversions
| Power | Time | Energy |
|---|---|---|
| 100 W | 10 h | 1 kWh |
| 500 W | 2 h | 1 kWh |
| 2,000 W | 30 min | 1 kWh |