Kilowatt-hour (kWh)
The kilowatt-hour is a unit of energy, used for electricity billing, EV battery capacity, and home energy monitoring. Its symbol is kWh.
kWh
kcal
1 kilowatt-hour equals
| Kilocalories | 860.421 kcal |
| Joules | 3,600,000 J |
About the kilowatt-hour
The kilowatt-hour became the standard billing unit for electricity as power grids expanded in the early 20th century, and remains on every electricity bill today.
In everyday use the kilowatt-hour appears in electricity billing, EV battery capacity, and home energy monitoring. As a point of reference: a typical EV battery stores 60 to 100 kWh.