Direct conversion
Convert kilowatt-hour [kWh] to kilojoule [kJ] instantly with formula, examples, chart, and FAQs.
Quick answer
Use the calculator below for any custom value, then check the formula, examples, chart, and reverse conversion links.
1 kilowatt-hour [kWh] = 3600 kilojoule [kJ]
1 kilowatt-hour [kWh] = 3600 kilojoule [kJ]
Example: 1 kilowatt-hour [kWh] equals 3600 kilojoule [kJ].
Energy conversions use joule as the reference unit, including electrical, thermal, nutrition, and mechanical energy units.
Displayed results are rounded for readability. The calculator keeps enough precision for everyday use and switches to scientific notation for very large or very small values. Last reviewed: 2026-05-21.
The kilowatt-hour is an energy unit equal to the energy used by one kilowatt of power for one hour.
HistoryKilowatt-hours became common through electric utility metering and billing.
Current useKilowatt-hours are used for electricity bills, batteries, appliances, solar systems, and energy planning.
The kilojoule is an energy unit equal to 1000 joules.
HistoryKilojoules are a metric multiple of joules and became common where joules are too small.
Current useKilojoules are used for food energy labels, thermodynamics, exercise energy, and engineering calculations.
| kilowatt-hour [kWh] | kilojoule [kJ] |
|---|---|
| 1 | 3600 |
| 2 | 7200 |
| 5 | 18000 |
| 10 | 36000 |
| 20 | 72000 |
| 25 | 90000 |
| 50 | 180000 |
| 100 | 360000 |
| 1000 | 3600000 |
Use this formula: 1 kilowatt-hour [kWh] = 3600 kilojoule [kJ] Enter your value in the calculator and the result updates instantly.
1 kilowatt-hour [kWh] equals 3600 kilojoule [kJ].
Yes. Use the swap button in the calculator or open the related reverse conversion link when it is listed on this page.