1 kilowatt-hour (kWh) = 3,600 kilojoules (kJ). To convert, multiply by 3,600: kJ = kWh × 3,600. For example, 5 kWh = 18,000 kJ.
kJ = kWh × 3,600
Kilowatt-hours to kilojoules table
| Kilowatt-hours (kWh) | Kilojoules (kJ) |
|---|---|
| 1 | 3,600 |
| 2 | 7,200 |
| 3 | 10,800 |
| 4 | 14,400 |
| 5 | 18,000 |
| 10 | 36,000 |
| 20 | 72,000 |
| 25 | 90,000 |
| 50 | 180,000 |
| 100 | 360,000 |
| 250 | 900,000 |
| 500 | 1,800,000 |
| 1,000 | 3,600,000 |
The two units
Kilowatt-hour (kWh). One kilowatt for one hour: the "unit" on an electricity bill.
Kilojoule (kJ). One thousand joules; food labels outside the US often give energy in kJ.
Because both units are defined in terms of the same base unit, the factor 3,600 is exact, not a rounded measurement.
Convert kilowatt-hours to other units
- Kilowatt-hours to joules — 1 kWh = 3,600,000 J
- Kilowatt-hours to calories — 1 kWh = 860,420.6501 cal
- Kilowatt-hours to kilocalories — 1 kWh = 860.4206501 kcal
- Kilowatt-hours to watt-hours — 1 kWh = 1,000 Wh
- Kilowatt-hours to British thermal units — 1 kWh = 3,412.141633 BTU
- Kilowatt-hours to electronvolts — 1 kWh = 2.246943e+25 eV
Convert other units to kilojoules
Questions people ask
- How many kilojoules are in a kilowatt-hour?
- 3,600, exactly.
- How do you convert kilowatt-hours to kilojoules?
- kJ = kWh × 3,600. It is the same as dividing by 0.0002777778.
- How do you convert kilojoules back to kilowatt-hours?
- kWh = kJ ÷ 3,600. See kilojoules to kilowatt-hours.
Results use the legal definitions of each unit and are checked against the Pint unit library. Display rounds to 10 significant digits. All unit conversions · More tools
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