Kwh to Joules Converter
Convert kWh to joules instantly. Enter any value and get the result. Includes a conversion table and the exact formula.
| Kwh | Joules |
|---|
How to convert kWh to joules
Enter your value
Type the number of kwh you want to convert into the left box. The result in joules appears instantly in the right box. You can also type into the right box to convert in the other direction.
Use the swap button
Click the ⇄ Swap button to reverse the conversion — Joules to Kwh. Your current value carries across so you don't have to re-enter anything.
About Kwh and Joules
kWh and joules are both units of energy. Use this converter to switch between them instantly.
1 kWh = 3.6 megajoules = 3,600,000 joules. A UK home uses ~8 kWh/day of electricity. UK petrol contains ~9.5 kWh per litre — useful for comparing EV efficiency (in kWh/100km) to petrol cars (in L/100km).
| Kwh | Joules |
|---|---|
| 0.001 | 3600 |
| 0.01 | 3.6e+04 |
| 0.1 | 3.6e+05 |
| 1 | 3.6e+06 |
| 5 | 1.8e+07 |
| 10 | 3.6e+07 |
Frequently asked questions
How do I convert kWh to joules?
To convert kWh to joules, multiply by 3600000. Or use the calculator above for instant results.
How many joules are in 1 kWh?
1 kWh equals 3600000 joules.
Is the kWh to joules converter free?
Yes, the kWh to joules converter is completely free with no sign-up required, no downloads, and it works offline once the page has loaded.