Kilowatt-hours to Joules Converter
Convert kilowatt-hour to joule instantly. Type a value below — the result updates as you type.
When you need to convert kilowatt-hour to joule
Energy conversions appear on nutrition labels, utility bills and appliance specs, letting you compare food energy, electricity use and heating output on a common scale.
Typical values: 0.5 kWh is about 1.8e+06 J, and 5 kWh works out to roughly 1.8e+07 J. Because the ratio is fixed at 3.6e+06, you can scale any amount linearly — doubling the kilowatt-hours doubles the joules.
Food packaging, power meters and heating equipment each prefer different energy units, so converting makes them directly comparable.
How to convert kilowatt-hour to joule
One kilowatt-hour equals 3.6e+06 joules. To convert, multiply the number of kilowatt-hours by 3.6e+06:
joules = kilowatt-hours × 3.6e+06
For example, 10 kilowatt-hours × 3.6e+06 = 3.6e+07 joules.
Kilowatt-hours to joules conversion table
| Energy (kWh) | Joules (J) |
|---|---|
| 1 kWh | 3.6e+06 J |
| 2 kWh | 7.2e+06 J |
| 3 kWh | 1.08e+07 J |
| 5 kWh | 1.8e+07 J |
| 10 kWh | 3.6e+07 J |
| 20 kWh | 7.2e+07 J |
| 50 kWh | 1.8e+08 J |
| 100 kWh | 3.6e+08 J |
FAQ
How many joules are in a kilowatt-hour?
One kilowatt-hour = 3.6e+06 joules.
How do I convert joules back to kilowatt-hours?
Divide by 3.6e+06, or use the joules to kilowatt-hours converter.