Convert kilojoules to watt hours
1 kJ = 0.27777778 Wh. Change the amount below, or read the formula and the reference table further down.
1 kilojoule equals
watt hours
1 kJ = 0.27777778 Wh
The formula
Kilojoules and watt hours both measure energy from the same zero, so a single multiplier does the job.
Wh = kJ × 0.2777777778
Going the other way? Convert watt hours to kilojoules.
Kilojoules to watt hours table
Common values, rounded for reading.
| Kilojoules (kJ) | Watt hours (Wh) |
|---|---|
| 1 | 0.277778 |
| 2 | 0.555556 |
| 3 | 0.833333 |
| 4 | 1.1111 |
| 5 | 1.3889 |
| 6 | 1.6667 |
| 7 | 1.9444 |
| 8 | 2.2222 |
| 9 | 2.5 |
| 10 | 2.7778 |
| 15 | 4.1667 |
| 20 | 5.5556 |
| 25 | 6.9444 |
| 30 | 8.3333 |
| 40 | 11.1111 |
| 50 | 13.8889 |
| 75 | 20.8333 |
| 100 | 27.7778 |
| 250 | 69.4444 |
| 500 | 138.89 |
| 1,000 | 277.78 |
Questions people ask
- How many watt hours are in a kilojoule?
- One kilojoule equals 0.2777777778 watt hours.
- How do I convert kilojoules to watt hours by hand?
- Multiply the number of kilojoules by 0.2777777778. For a rough check, 0.278 is close enough for most everyday use.
- What is 1 kilojoule in watt hours?
- 1 kilojoule is 0.27777778 watt hours.
Calcuit generates this page from a unit table, so the factors here match every other page on the site.