Kilojoules to watt-hours converter
Watt-hours (Wh)
1 kilojoule = 0.2777777778 watt-hours
How to convert kilojoules to watt-hours
Wh = kJ × 0.277777777778
Multiply the number of kilojoules by 0.277777777778 to get watt-hours. Going the other way, divide by 0.277777777778 (or multiply by 3.6).
One kilojoule is exactly defined as 0.277777777778 watt-hours (to 12 significant figures), and one watt-hour is 3.6 kilojoules.
Worked examples
- Convert 5 kilojoules: 5 × 0.277777777778 = 1.388888889 1.388888889 watt-hours.
- Convert 12.5 kilojoules: 12.5 × 0.277777777778 = 3.472222222 3.472222222 watt-hours.
- Convert 250 kilojoules: 250 × 0.277777777778 = 69.44444444 69.44444444 watt-hours.
Quick-reference table
| kJ | Wh |
|---|---|
| 1 | 0.2777777778 |
| 2 | 0.5555555556 |
| 3 | 0.8333333333 |
| 5 | 1.388888889 |
| 10 | 2.777777778 |
| 15 | 4.166666667 |
| 20 | 5.555555556 |
| 25 | 6.944444444 |
| 50 | 13.88888889 |
| 75 | 20.83333333 |
| 100 | 27.77777778 |
| 1,000 | 277.7777778 |
| Wh | kJ |
|---|---|
| 1 | 3.6 |
| 2 | 7.2 |
| 3 | 10.8 |
| 5 | 18 |
| 10 | 36 |
| 15 | 54 |
| 20 | 72 |
| 25 | 90 |
| 50 | 180 |
| 75 | 270 |
| 100 | 360 |
| 1,000 | 3,600 |
Related conversions
Frequently asked questions
How many watt-hours are in 1 kilojoule?
1 kilojoule equals 0.2777777778 watt-hours.
What is the formula to convert kilojoules to watt-hours?
Use Wh = kJ × 0.277777777778. Multiply the number of kilojoules by 0.277777777778 to get watt-hours. Going the other way, divide by 0.277777777778 (or multiply by 3.6).
What is 100 kilojoules in watt-hours?
100 kilojoules is 27.77777778 watt-hours.