The kilojoule
The kilojoule (kJ) equals exactly 1,000 joules. It is the standard unit on EU and many non-US nutrition labels — 1 dietary calorie ≈ 4.184 kJ. It also appears in industrial-process specifications and energy-storage ratings.
Kilojoules to Kilowatt-hours Converter
1 kJ = 0.000277778 kWh
1 kilojoule equals 0.000277778 kilowatt-hours. To convert kilojoules to kilowatt-hours, multiply the kilojoule value by 0.000277778. For quick reference: 1 kJ = 0.000277778 kWh, 5 kJ = 0.00138889 kWh, 10 kJ = 0.00277778 kWh, 100 kJ = 0.0277778 kWh.
Formula
Kilowatt-hours = Kilojoules × 0.000277778Quick
How to convert kilojoules to kilowatt-hours
Take your value
Start with your value in kilojoules.
Multiply by 0.000277778
Multiply the kilojoule value by 0.000277778. This is the exact conversion factor from kilojoules to kilowatt-hours.
Read the result
The product is your value in kilowatt-hours. For example, 5 kJ × 0.000277778 = 0.00138889 kWh.
Conversion formula
The exact factor from kilojoules to kilowatt-hours is 0.000277778.
Kilowatt-hours = Kilojoules × 0.000277778
Kilojoules to Kilowatt-hours conversion table
Fifty common reference values, hand-picked for skim utility. Use the calculator above for any value not listed.
| Kilojoules (kJ) | Kilowatt-hours (kWh) |
|---|---|
| 0.001 kJ | 2.7778 × 10^−7 kWh |
| 0.01 kJ | 2.7778 × 10^−6 kWh |
| 0.1 kJ | 2.7778 × 10^−5 kWh |
| 0.5 kJ | 0.00013889 kWh |
| 1 kJ | 0.00027778 kWh |
| 1.5 kJ | 0.00041667 kWh |
| 2 kJ | 0.00055556 kWh |
| 5 kJ | 0.0013889 kWh |
| 10 kJ | 0.0027778 kWh |
| 20 kJ | 0.0055556 kWh |
| 50 kJ | 0.013889 kWh |
| 100 kJ | 0.027778 kWh |
| 200 kJ | 0.055556 kWh |
| 250 kJ | 0.069444 kWh |
| 500 kJ | 0.13889 kWh |
| 1000 kJ | 0.27778 kWh |
| 2000 kJ | 0.55556 kWh |
| 2500 kJ | 0.69444 kWh |
| 3600 kJ | 1 kWh |
| 5000 kJ | 1.3889 kWh |
| 7500 kJ | 2.0833 kWh |
| 10000 kJ | 2.7778 kWh |
| 25000 kJ | 6.9444 kWh |
| 50000 kJ | 13.889 kWh |
| 100000 kJ | 27.778 kWh |
| 250000 kJ | 69.444 kWh |
| 500000 kJ | 138.89 kWh |
| 1000000 kJ | 277.78 kWh |
| 2000000 kJ | 555.56 kWh |
| 3600000 kJ | 1000 kWh |
| 5000000 kJ | 1388.9 kWh |
| 10000000 kJ | 2777.8 kWh |
| 25000000 kJ | 6944.4 kWh |
| 50000000 kJ | 13889 kWh |
| 100000000 kJ | 27778 kWh |
| 250000000 kJ | 69444 kWh |
| 500000000 kJ | 138889 kWh |
| 1000000000 kJ | 277778 kWh |
| 2000000000 kJ | 555556 kWh |
| 5000000000 kJ | 1388889 kWh |
| 10000000000 kJ | 2777778 kWh |
| 20000000000 kJ | 5555556 kWh |
| 50000000000 kJ | 13888889 kWh |
| 100000000000 kJ | 27777778 kWh |
| 1000000000000 kJ | 277777778 kWh |
| 10000000000000 kJ | 2777777778 kWh |
| 100000000000000 kJ | 27777777778 kWh |
| 1000000000000000 kJ | 277777777778 kWh |
| 10000000000000000 kJ | 2777777777778 kWh |
| 100000000000000000 kJ | 27777777777778 kWh |
Real-world reference
A medium banana provides about 450 kJ of food energy. A laptop battery typically stores 200–300 kJ.
Frequently asked questions
- How many kilowatt-hours are in 1 kilojoule?
- 1 kilojoule equals 0.000277778 kilowatt-hours.
- How do I convert kilojoules to kilowatt-hours?
- Multiply the kilojoule value by 0.000277778. So x kJ × 0.000277778 = the equivalent in kWh.
- What is 5 kilojoules in kilowatt-hours?
- 5 kilojoules equals 0.00138889 kilowatt-hours.
- What is 10 kilojoules in kilowatt-hours?
- 10 kilojoules equals 0.00277778 kilowatt-hours.
- What is 100 kilojoules in kilowatt-hours?
- 100 kilojoules equals 0.0277778 kilowatt-hours.
- How do I convert back from kilowatt-hours to kilojoules?
- Multiply the kilowatt-hour value by 3600. For example, 1 kWh = 3600 kJ.
- Is the kilojoule bigger than the kilowatt-hour?
- No. 1 kilojoule is smaller than 1 kilowatt-hour. It takes 3600 kilojoules to equal 1 kilowatt-hour.
- Are these conversion factors exact?
- Yes. The factor of 0.000277778 is derived directly from the SI definitions of kilojoule and kilowatt-hour.
About the kilojoule and the kilowatt-hour
The kilowatt-hour
The kilowatt-hour (kWh) equals exactly 3,600,000 joules — the unit on every household electricity bill. One kWh runs a 1,000 W appliance for one hour.