Joules to kilowatt-hours converter
Kilowatt-hours (kWh)
1 joule = 2.777778e-7 kilowatt-hours
How to convert joules to kilowatt-hours
kWh = J × 2.77777777778 × 10^-7
Multiply the number of joules by 2.77777777778 × 10^-7 to get kilowatt-hours. Going the other way, divide by 2.77777777778 × 10^-7 (or multiply by 3600000).
One joule is exactly defined as 2.77777777778 × 10^-7 kilowatt-hours (to 12 significant figures), and one kilowatt-hour is 3600000 joules.
Worked examples
- Convert 5 joules: 5 × 2.77777777778 × 10^-7 = 0.000001388888889 0.000001388888889 kilowatt-hours.
- Convert 12.5 joules: 12.5 × 2.77777777778 × 10^-7 = 0.000003472222222 0.000003472222222 kilowatt-hours.
- Convert 250 joules: 250 × 2.77777777778 × 10^-7 = 0.00006944444444 0.00006944444444 kilowatt-hours.
Quick-reference table
| J | kWh |
|---|---|
| 1 | 2.777778e-7 |
| 2 | 5.555556e-7 |
| 3 | 8.333333e-7 |
| 5 | 0.000001388888889 |
| 10 | 0.000002777777778 |
| 15 | 0.000004166666667 |
| 20 | 0.000005555555556 |
| 25 | 0.000006944444444 |
| 50 | 0.00001388888889 |
| 75 | 0.00002083333333 |
| 100 | 0.00002777777778 |
| 1,000 | 0.0002777777778 |
| kWh | J |
|---|---|
| 1 | 3,600,000 |
| 2 | 7,200,000 |
| 3 | 10,800,000 |
| 5 | 18,000,000 |
| 10 | 36,000,000 |
| 15 | 54,000,000 |
| 20 | 72,000,000 |
| 25 | 90,000,000 |
| 50 | 180,000,000 |
| 75 | 270,000,000 |
| 100 | 360,000,000 |
| 1,000 | 3,600,000,000 |
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Frequently asked questions
How many kilowatt-hours are in 1 joule?
1 joule equals 2.777778e-7 kilowatt-hours.
What is the formula to convert joules to kilowatt-hours?
Use kWh = J × 2.77777777778 × 10^-7. Multiply the number of joules by 2.77777777778 × 10^-7 to get kilowatt-hours. Going the other way, divide by 2.77777777778 × 10^-7 (or multiply by 3600000).
What is 100 joules in kilowatt-hours?
100 joules is 0.00002777777778 kilowatt-hours.