How to convert kilowatt-hours to joules
To convert kilowatt-hours (kWh) to joules (J), multiply the value in kilowatt-hours by 3,600,000.
J = kWh × 3,600,000
Example: 5 kWh = 18,000,000 J.
You can also type 5 kWh to J into the smart calculator, or mix units: 1 kWh + 1 J.
Kilowatt-Hours to Joules conversion table
| Kilowatt-Hours | Joules |
|---|---|
| 0.01 kWh | 36,000 J |
| 0.1 kWh | 360,000 J |
| 0.25 kWh | 900,000 J |
| 0.5 kWh | 1,800,000 J |
| 1 kWh | 3,600,000 J |
| 2 kWh | 7,200,000 J |
| 3 kWh | 10,800,000 J |
| 4 kWh | 14,400,000 J |
| 5 kWh | 18,000,000 J |
| 6 kWh | 21,600,000 J |
| 7 kWh | 25,200,000 J |
| 8 kWh | 28,800,000 J |
| 9 kWh | 32,400,000 J |
| 10 kWh | 36,000,000 J |
| 12 kWh | 43,200,000 J |
| 15 kWh | 54,000,000 J |
| 20 kWh | 72,000,000 J |
| 25 kWh | 90,000,000 J |
| 30 kWh | 108,000,000 J |
| 40 kWh | 144,000,000 J |
| 50 kWh | 180,000,000 J |
| 60 kWh | 216,000,000 J |
| 75 kWh | 270,000,000 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 |
Converting joules back to kilowatt-hours
1 J = 0.0000002777777778 kWh. See the Joules to Kilowatt-Hours converter, or press the swap button above.
About the units
Kilowatt-hour (kWh)
Exactly 3.6 megajoules: the "unit" on an electricity bill.
Joule (J)
The SI unit of energy: one newton acting over one meter.
Energy is the capacity to do work. The SI unit is the joule. Food energy is labelled in kilocalories (Calories with a capital C) or kilojoules, electricity is billed in kilowatt-hours, and heating often uses BTU or therms.
Questions and answers
How many joules are in a kilowatt-hour?
One kilowatt-hour (kWh) equals 3,600,000 joules (J).
How do I convert kilowatt-hours to joules?
To convert kilowatt-hours to joules, multiply the value in kilowatt-hours by 3,600,000. The formula is J = kWh × 3,600,000. For example, 5 kWh = 18,000,000 J.
What is 5 kWh in J?
5 kilowatt-hours is 18,000,000 joules.
Which is bigger, a kilowatt-hour or a joule?
A kilowatt-hour is bigger: 1 kWh = 3,600,000 J.
Are Calories on food labels the same as calories?
No. The food Calorie (capital C) is a kilocalorie: 1,000 small calories, or 4.184 kilojoules.
Does this kWh to J converter work offline?
Yes. ConvertEasy is a progressive web app: after your first visit it keeps working with no connection, and you can install it to your home screen from the browser menu.