Convert Kilowatt-hours to Kilojoules
kWh to kJ · energy conversion
What are kilowatt-hours and kilojoules?
A kilowatt-hour is 1,000 watt-hours, the unit electric utilities bill by. A kilojoule is 1,000 joules, used for food energy outside the US. For reference: a food Calorie is one kilocalorie (4,184 J), and home electricity is billed in kilowatt-hours.
How to convert kilowatt-hours to kilojoules
1 kWh = 3,600 kJ. To convert, multiply the number of kilowatt-hours by 3,600. For example, 5 kWh = 18,000 kJ, and 20 kWh = 72,000 kJ. To go the other way, multiply kilojoules by 0.000277778 (since 1 kJ = 0.000277778 kWh).
Kilowatt-hours to Kilojoules conversion table
| Kilowatt-hours (kWh) | Kilojoules (kJ) |
|---|---|
| 1 | 3,600 |
| 10 | 36,000 |
| 100 | 360,000 |
| 500 | 1,800,000 |
| 1,000 | 3,600,000 |
| 2,000 | 7,200,000 |
| 5,000 | 18,000,000 |
FAQ
What is 1 kWh in kJ?
1 kWh = 3,600 kJ. To convert any amount, multiply the number of kilowatt-hours by 3,600.
How do I convert kilojoules back to kilowatt-hours?
Go the other way: 1 kJ = 0.000277778 kWh, so multiply kilojoules by 0.000277778 to get kilowatt-hours.
Is a kilowatt-hour bigger than a kilojoule?
Yes — 1 kWh is the larger unit, equal to 3,600 kJ.
Are these energy conversions exact?
They use the standard internationally-defined conversion factors. Results are rounded to six significant figures for readability, which is accurate enough for everyday and most technical use.