Kilojoules to Watt-hours Converter
Convert kilojoules (kJ) to watt-hours (Wh) instantly. Energy conversions link food labels in kJ and kcal, SP Group bills in kWh and air-conditioner capacity in BTU.
Result
- Watt-hours
- 0.277778 Wh
How to use the kilojoules to watt-hours converter
- Enter the kilojoules (kJ).
- The results update as you type, or press Calculate.
- Read the watt-hours first, then the supporting figures below it.
Formula
Watt-hours = kilojoules × 0.2777777778
Worked example
For example, with these inputs:
- Kilojoules (kJ): 1
the calculator returns:
- Watt-hours: 0.277778 Wh
Kilojoules to Watt-hours table
| Kilojoules | Watt-hours |
|---|---|
| 1 kJ | 0.277778 Wh |
| 2 kJ | 0.555556 Wh |
| 5 kJ | 1.3889 Wh |
| 10 kJ | 2.7778 Wh |
| 20 kJ | 5.5556 Wh |
| 25 kJ | 6.9444 Wh |
| 50 kJ | 13.8889 Wh |
| 100 kJ | 27.7778 Wh |
| 250 kJ | 69.4444 Wh |
| 500 kJ | 138.8889 Wh |
| 1,000 kJ | 277.7778 Wh |
About this conversion
Energy conversions link food labels in kJ and kcal, SP Group bills in kWh and air-conditioner capacity in BTU.
A conversion table is handy for common values, but a calculator is faster and avoids interpolation errors for anything in between.
Writing the units next to every number while you work is the simplest way to avoid mistakes. If the units do not cancel to leave the one you want, the calculation is set up wrongly.
Frequently asked questions
How many watt-hours are in one kilojoule?
1 kJ = 0.277778 Wh.
How do I convert kJ to Wh?
Watt-hours = kilojoules × 0.2777777778.