kWh to Joules Converter
Connects electricity bills and battery capacities with the SI energy unit used in science.
1 kWh = 3,600,000 J
joules
1 kWh = 3,600,000 J
How to convert kilowatt-hours to joules
Multiply the number of kilowatt-hours by 3,600,000.
Formula
J = kWh × 3,600,000
Examples
- 0.5 kWh × 3,600,000 = 1,800,000 J
- 10 kWh × 3,600,000 = 36,000,000 J
- 75 kWh × 3,600,000 = 270,000,000 J
Kilowatt-hours to joules conversion table
| Kilowatt-hours (kWh) | Joules (J) |
|---|---|
| 0.001 | 3,600 |
| 0.01 | 36,000 |
| 0.1 | 360,000 |
| 0.5 | 1,800,000 |
| 1 | 3,600,000 |
| 2 | 7,200,000 |
| 5 | 18,000,000 |
| 10 | 36,000,000 |
| 50 | 180,000,000 |
| 75 | 270,000,000 |
| 100 | 360,000,000 |
| 1,000 | 3,600,000,000 |
Values rounded to 4 decimal places or 4 significant digits.
About kilowatt-hours
A kilowatt-hour is 1,000 watt-hours, or 3.6 million joules. Electricity bills and electric car batteries are measured in kilowatt-hours.
About joules
The joule is the SI unit of energy. One joule is the work done by a force of one newton over one meter, or one watt of power for one second.
Frequently asked questions
How many joules are in one kilowatt-hour?
One kilowatt-hour equals 3,600,000 joules.
How do I convert kilowatt-hours to joules?
Multiply the number of kilowatt-hours by 3,600,000. For example: 10 kWh × 3,600,000 = 36,000,000 J.
How many kilowatt-hours are in one joule?
One joule equals 2.7778e-7 kilowatt-hours.
Is the kWh to J conversion exact?
Yes. The factor follows directly from the official definitions of both units, so the only rounding is in how many decimals are displayed.