Convert Kilojoules to Watt Hours
1 kilojoule = 0.2777778 watt hours. Type any value below to convert in either direction — the calculation happens in your browser.
Kilojoules to Watt Hours formula
Multiply the number of kilojoules by 0.2777778 to get watt hours.
watt hours = kilojoules × 0.2777778To go the other way: divide the number of watt hours by 0.2777778, or multiply by 3.6.
kilojoules = watt hours ÷ 0.2777778Kilojoules to Watt Hours conversion table
| Kilojoules | Watt Hours |
|---|---|
| 1 kJ | 0.2777778 Wh |
| 2 kJ | 0.5555556 Wh |
| 3 kJ | 0.8333333 Wh |
| 4 kJ | 1.111111 Wh |
| 5 kJ | 1.388889 Wh |
| 6 kJ | 1.666667 Wh |
| 7 kJ | 1.944444 Wh |
| 8 kJ | 2.222222 Wh |
| 9 kJ | 2.5 Wh |
| 10 kJ | 2.777778 Wh |
| 15 kJ | 4.166667 Wh |
| 20 kJ | 5.555556 Wh |
| 25 kJ | 6.944444 Wh |
| 30 kJ | 8.333333 Wh |
| 40 kJ | 11.111111 Wh |
| 50 kJ | 13.888889 Wh |
| 75 kJ | 20.833333 Wh |
| 100 kJ | 27.777778 Wh |
| 250 kJ | 69.444444 Wh |
| 500 kJ | 138.888889 Wh |
| 1,000 kJ | 277.777778 Wh |
Watt Hours to Kilojoules conversion table
| Watt Hours | Kilojoules |
|---|---|
| 1 Wh | 3.6 kJ |
| 2 Wh | 7.2 kJ |
| 3 Wh | 10.8 kJ |
| 4 Wh | 14.4 kJ |
| 5 Wh | 18 kJ |
| 6 Wh | 21.6 kJ |
| 7 Wh | 25.2 kJ |
| 8 Wh | 28.8 kJ |
| 9 Wh | 32.4 kJ |
| 10 Wh | 36 kJ |
About the kilojoule
A kilojoule is 1,000 joules and is how food energy is labelled in most of the world.
About the watt hour
A watt hour is the energy of one watt sustained for one hour, equal to 3,600 joules.
Frequently asked questions
How many watt hours are in a kilojoule?
There are 0.2777778 watt hours in one kilojoule.
How many kilojoules are in a watt hour?
There are 3.6 kilojoules in one watt hour.
Is this conversion exact?
The ratio between the kilojoule and the watt hour is fixed by definition, so the conversion is exact — the figures shown here are rounded for readability only.
What is 10 kilojoules in watt hours?
10 kilojoules equals 2.777778 watt hours.
Related energy conversions
- Joules to Watt Hours
- Kilojoules to Joules
- Kilojoules to Calories
- Kilojoules to Kilocalories
- Kilojoules to Kilowatt Hours
- Kilojoules to British Thermal Units
- Kilojoules to Electronvolts
- Kilojoules to Foot Pounds
- Calories to Watt Hours
- Kilocalories to Watt Hours
- Kilowatt Hours to Watt Hours
- British Thermal Units to Watt Hours
- Electronvolts to Watt Hours
- Foot Pounds to Watt Hours