Convert Kilowatt-hour to Kilojoule
1 kilowatt-hour = 3,600 kilojoule (kJ). For example, 10 kilowatt-hour = 36,000 kilojoule and 100 kilowatt-hour = 360,000 kilojoule. Type any value below to convert kilowatt-hour to kilojoule both ways — it runs entirely in your browser.
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Kilowatt-hour to Kilojoule conversion formula
To convert kilowatt-hour to kilojoule, multiply by 3,600:
kilojoule = kilowatt-hour × 3,600
Going the other way, 1 kilojoule = 0.0002777778 kilowatt-hour, so
kilowatt-hour = kilojoule × 0.0002777778.
Kilowatt-hour to Kilojoule — worked examples
| Kilowatt-hour | Kilojoule |
|---|---|
| 1 kWh | 3,600 kJ |
| 2 kWh | 7,200 kJ |
| 3 kWh | 10,800 kJ |
| 5 kWh | 18,000 kJ |
| 10 kWh | 36,000 kJ |
| 25 kWh | 90,000 kJ |
| 50 kWh | 180,000 kJ |
| 100 kWh | 360,000 kJ |
Kilowatt-hour ↔ Kilojoule reference table
| Kilowatt-hour → Kilojoule | Kilojoule → Kilowatt-hour |
|---|---|
| 1 kWh = 3,600 kJ | 1 kJ = 0.0002777778 kWh |
| 2 kWh = 7,200 kJ | 2 kJ = 0.0005555556 kWh |
| 5 kWh = 18,000 kJ | 5 kJ = 0.001388889 kWh |
| 10 kWh = 36,000 kJ | 10 kJ = 0.002777778 kWh |
| 20 kWh = 72,000 kJ | 20 kJ = 0.005555556 kWh |
| 50 kWh = 180,000 kJ | 50 kJ = 0.01388889 kWh |
| 100 kWh = 360,000 kJ | 100 kJ = 0.02777778 kWh |
| 250 kWh = 900,000 kJ | 250 kJ = 0.06944444 kWh |
| 500 kWh = 1,800,000 kJ | 500 kJ = 0.1388889 kWh |
| 1000 kWh = 3,600,000 kJ | 1000 kJ = 0.2777778 kWh |
About kilowatt-hour and kilojoule
Kilowatt-hour: A kilowatt-hour is 1,000 watt-hours — exactly 3,600,000 joules (3.6 MJ). It is the "unit" your electricity meter bills.
Kilojoule: A kilojoule is 1,000 joules — the energy unit on food labels (shown next to kilocalories) and for everyday amounts of energy.
Frequently asked questions
- How many kilojoule are in 1 kilowatt-hour?
- 1 kilowatt-hour = 3,600 kilojoule (kJ).
- How do I convert kilowatt-hour to kilojoule?
- Multiply the number of kilowatt-hour by 3,600. For example, 10 kilowatt-hour = 10 × 3,600 = 36,000 kilojoule.
- How many kilowatt-hour are in 1 kilojoule?
- 1 kilojoule = 0.0002777778 kilowatt-hour.
- Which is bigger, kilowatt-hour or kilojoule?
- 1 kilowatt-hour equals 3,600 kilojoule, so a kilowatt-hour is the larger unit.