kilowatt-hours to kilojoules
Convert kilowatt-hour to kilojoule — instant, free, with the formula shown.
1 kWh=3600 kJ
How to convert kilowatt-hour to kilojoule
To convert kilowatt-hour to kilojoule, multiply by 3600:
kJ = kWh × 3600
For example, 10 kWh × 3600 = 36000 kJ.
kWh to kJ conversion table
| kilowatt-hours (kWh) | kilojoules (kJ) |
|---|---|
| 1 kWh | 3600 kJ |
| 2 kWh | 7200 kJ |
| 5 kWh | 18000 kJ |
| 10 kWh | 36000 kJ |
| 25 kWh | 90000 kJ |
| 50 kWh | 180000 kJ |
| 100 kWh | 360000 kJ |
| 250 kWh | 900000 kJ |
| 500 kWh | 1800000 kJ |
| 1000 kWh | 3600000 kJ |
Other kilowatt-hour conversions
Convert to kilojoule from another unit
kWh to kJ — frequently asked
How many kilojoules are in 1 kilowatt-hour?
1 kilowatt-hour = 3600 kilojoules (kWh × 3600 = kJ).
What is the formula to convert kilowatt-hour to kilojoule?
Multiply your kilowatt-hour value by 3600 to get kilojoule.
How do I convert 10 kilowatt-hours to kilojoules?
10 kWh = 36000 kJ. For 100 kWh the answer is 360000 kJ. Use the calculator on this page for any other value.
When to convert kilowatt-hour to kilojoule
1Electricity bills (kWh)
2Nutrition labels (kcal / food cal)
3HVAC and heating (BTU, therms)
4Physics and chemistry (J, eV)
Energy conversion — common questions
Is a food calorie the same as a calorie?
No — a food 'Calorie' (capital C) actually means 1 kilocalorie = 1,000 small calories = 4,184 J. Nutrition labels typically write 'cal' meaning kcal.
How many joules in 1 kWh?
1 kWh = 3,600,000 J (3.6 MJ). Because 1 kW × 1 hour = 1,000 W × 3,600 s = 3,600,000 J.
What is a BTU?
British Thermal Unit — the energy required to raise 1 pound of water by 1 °F. 1 BTU ≈ 1,055 J.
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