Watt Hours to Kilojoules Converter
EngineeringJoules, calories, kilowatt-hours and more.
How to convert Watt Hours to Kilojoules
Multiply the watt hours value by 3.6: 1 Wh = 3.6 kJ. Going the other way, 1 kJ = 0.277778 Wh, so divide by 3.6 or use the Kilojoules to Watt Hours converter.
About these units
Watt Hours (Wh)
A watt-hour is the energy of one watt sustained for one hour, exactly 3,600 joules. Phone and laptop batteries are rated in watt-hours.
Kilojoules (kJ)
A kilojoule is 1,000 joules. Food energy is labelled in kilojoules in many countries; 1 kJ is about 0.239 kilocalories.
Watt Hours to Kilojoules conversion table
| Watt Hours (Wh) | Kilojoules (kJ) |
|---|---|
| 1 Wh | 3.6 kJ |
| 2 Wh | 7.2 kJ |
| 3 Wh | 10.8 kJ |
| 4 Wh | 14.4 kJ |
| 5 Wh | 18 kJ |
| 10 Wh | 36 kJ |
| 20 Wh | 72 kJ |
| 25 Wh | 90 kJ |
| 50 Wh | 180 kJ |
| 100 Wh | 360 kJ |
| 500 Wh | 1,800 kJ |
| 1,000 Wh | 3,600 kJ |
More watt hours conversions
- Watt Hours to Kilowatt Hours1 Wh = 0.001 kWh
- Watt Hours to Electron Volts1 Wh = 2.2469e+22 eV
- Watt Hours to Megawatt Hours1 Wh = 1e-6 MWh
- Watt Hours to Joules1 Wh = 3,600 J
- Watt Hours to Calories1 Wh = 860.421 cal
- Watt Hours to British Thermal Units1 Wh = 3.41213 BTU
- Watt Hours to Ergs1 Wh = 3.6e+10 erg
See every unit on the Energy Converter.