Kilowatt-hours to joules converter
Joules (J)
1 kilowatt-hour = 3,600,000 joules
How to convert kilowatt-hours to joules
J = kWh × 3600000
Multiply the number of kilowatt-hours by 3600000 to get joules. Going the other way, divide by 3600000 (or multiply by 2.77777777778 × 10^-7).
One kilowatt-hour is exactly defined as 3600000 joules (to 12 significant figures), and one joule is 2.77777777778 × 10^-7 kilowatt-hours.
Worked examples
- Convert 5 kilowatt-hours: 5 × 3600000 = 18,000,000 18,000,000 joules.
- Convert 12.5 kilowatt-hours: 12.5 × 3600000 = 45,000,000 45,000,000 joules.
- Convert 250 kilowatt-hours: 250 × 3600000 = 900,000,000 900,000,000 joules.
Quick-reference table
| 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 |
| 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 |
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Frequently asked questions
How many joules are in 1 kilowatt-hour?
1 kilowatt-hour equals 3,600,000 joules.
What is the formula to convert kilowatt-hours to joules?
Use J = kWh × 3600000. Multiply the number of kilowatt-hours by 3600000 to get joules. Going the other way, divide by 3600000 (or multiply by 2.77777777778 × 10^-7).
What is 100 kilowatt-hours in joules?
100 kilowatt-hours is 360,000,000 joules.