Convert Kilowatt-hour to Joule
Convert Kilowatt-hour to Joule instantly. 1 kWh = 3,600,000 J. Formula, worked examples and a quick reference table.
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kWh
J
One kilowatt-hour equals 3,600,000 joules. To convert any number of kilowatt-hours to joules, multiply by 3,600,000.
The converter above works in both directions and updates as you type. Below you will find the formula, a worked example and a reference table of common values.
Kilowatt-hour to Joule formula
joule = kilowatt-hour × 3,600,000
To go the other way, use kilowatt-hour = joule ÷ 3,600,000.
Kilowatt-hour to Joule conversion table
| Kilowatt-hour | Joule |
|---|---|
| 1 kWh | 3,600,000 J |
| 2 kWh | 7,200,000 J |
| 3 kWh | 10,800,000 J |
| 5 kWh | 18,000,000 J |
| 10 kWh | 36,000,000 J |
| 20 kWh | 72,000,000 J |
| 25 kWh | 90,000,000 J |
| 50 kWh | 180,000,000 J |
| 100 kWh | 360,000,000 J |
| 250 kWh | 900,000,000 J |
| 500 kWh | 1,800,000,000 J |
| 1,000 kWh | 3,600,000,000 J |
Frequently asked questions
How many joules are in a kilowatt-hour? +
There are 3,600,000 joules in one kilowatt-hour.
What is 10 kWh in J? +
10 kWh equals 36,000,000 J. Multiply 10 by 3,600,000.
How do I convert joule back to kilowatt-hour? +
Use kilowatt-hour = joule ÷ 3,600,000. The converter above handles both directions, or see our dedicated Joule to Kilowatt-hour page.