Convert Kilowatt-hours to Joules
kWh to J · energy conversion
What are kilowatt-hours and joules?
A kilowatt-hour is 1,000 watt-hours, the unit electric utilities bill by. The joule is the SI unit of energy, the work done by one newton acting over one meter. For reference: a food Calorie is one kilocalorie (4,184 J), and home electricity is billed in kilowatt-hours.
How to convert kilowatt-hours to joules
1 kWh = 3,600,000 J. To convert, multiply the number of kilowatt-hours by 3,600,000. For example, 5 kWh = 18,000,000 J, and 20 kWh = 72,000,000 J. To go the other way, multiply joules by 2.7778e-7 (since 1 J = 2.7778e-7 kWh).
Kilowatt-hours to Joules conversion table
| Kilowatt-hours (kWh) | Joules (J) |
|---|---|
| 1 | 3,600,000 |
| 10 | 36,000,000 |
| 100 | 360,000,000 |
| 500 | 1,800,000,000 |
| 1,000 | 3,600,000,000 |
| 2,000 | 7,200,000,000 |
| 5,000 | 18,000,000,000 |
FAQ
What is 1 kWh in J?
1 kWh = 3,600,000 J. To convert any amount, multiply the number of kilowatt-hours by 3,600,000.
How do I convert joules back to kilowatt-hours?
Go the other way: 1 J = 2.7778e-7 kWh, so multiply joules by 2.7778e-7 to get kilowatt-hours.
Is a kilowatt-hour bigger than a joule?
Yes — 1 kWh is the larger unit, equal to 3,600,000 J.
Are these energy conversions exact?
They use the standard internationally-defined conversion factors. Results are rounded to six significant figures for readability, which is accurate enough for everyday and most technical use.