Convert Kilowatt-hours to Kilojoules
One kilowatt-hour equals 3,600 kilojoules. Type any value to convert kilowatt-hours to kilojoules instantly — with a full reference table below.
Convert Kilowatt-hours to Kilojoules
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How to convert Kilowatt-hours to Kilojoules
To convert kilowatt-hours to kilojoules, multiply by 3,600. One kilowatt-hour equals 3,600 kJ, and one kilojoule equals 0.000277778 kWh.
- Take the value in kilowatt-hours — for example 7.5 kWh.
- Multiply by 3,600 (the number of kilojoules in one kilowatt-hour).
- 7.5 × 3,600 = 27,000 kJ.
Kilowatt-hours to Kilojoules conversion table
| Kilowatt-hours | Kilojoules |
|---|---|
| 1 kWh | 3,600 kJ |
| 2 kWh | 7,200 kJ |
| 5 kWh | 18,000 kJ |
| 10 kWh | 36,000 kJ |
| 20 kWh | 72,000 kJ |
| 50 kWh | 180,000 kJ |
| 100 kWh | 360,000 kJ |
| 200 kWh | 720,000 kJ |
| 500 kWh | 1,800,000 kJ |
| 1,000 kWh | 3,600,000 kJ |
| 2,000 kWh | 7,200,000 kJ |
| Kilojoules | Kilowatt-hours |
|---|---|
| 1 kJ | 0.000277778 kWh |
| 2 kJ | 0.000555556 kWh |
| 5 kJ | 0.00138889 kWh |
| 10 kJ | 0.00277778 kWh |
| 20 kJ | 0.00555556 kWh |
| 50 kJ | 0.0138889 kWh |
| 100 kJ | 0.0277778 kWh |
| 200 kJ | 0.0555556 kWh |
| 500 kJ | 0.138889 kWh |
| 1,000 kJ | 0.277778 kWh |
| 2,000 kJ | 0.555556 kWh |
About converting Kilowatt-hours to Kilojoules
Kilowatt-hours (kWh) and Kilojoules (kJ) are both units of energy. The exact factor is 1 kWh = 3,600 kJ, so multiply by 3,600 to go from kilowatt-hours to kilojoules (or divide to go back).
The conversion runs entirely in your browser. Need the reverse? Use the Kilojoules to Kilowatt-hours converter, or the full unit converter for every unit at once.
Real-world energy in kilowatt-hours and kilojoules
| Example | Kilowatt-hours | Kilojoules |
|---|---|---|
| A 100 W bulb running for one hour | 0.1 kWh | 360 kJ |
| A smartphone battery (≈19 Wh) | ≈ 0.01925 kWh | ≈ 69.3 kJ |
| A 2,000 kcal daily diet | 2.324444 kWh | 8,368 kJ |
| One kilowatt-hour | 1 kWh | 3,600 kJ |
“≈” marks typical values; the rest are defined or measured figures.
The units
1,000 watt-hours, exactly 3.6 MJ — the 'unit' on electricity bills.
Used for: Electricity bills and EV batteries.
1,000 joules.
Used for: Food energy on labels in Australia and the EU.
The thermochemical calorie is exactly 4.184 J and a kilowatt-hour is exactly 3.6 MJ, so these factors are exact.