Convert Joule to Kilowatt-hour
1 joule = 2.7778e-7 kilowatt-hour (kWh). Type any value below to convert joule to kilowatt-hour both ways — it runs entirely in your browser.
Joule to Kilowatt-hour conversion formula
To convert joule to kilowatt-hour, multiply by 2.7778e-7:
kilowatt-hour = joule × 2.7778e-7
Going the other way, 1 kilowatt-hour = 3,600,000 joule, so
joule = kilowatt-hour × 3,600,000.
Joule to Kilowatt-hour — worked examples
| Joule | Kilowatt-hour |
|---|---|
| 1 J | 2.7778e-7 kWh |
| 2 J | 5.5556e-7 kWh |
| 3 J | 8.3333e-7 kWh |
| 5 J | 0.000001388889 kWh |
| 10 J | 0.000002777778 kWh |
| 25 J | 0.000006944444 kWh |
| 50 J | 0.00001388889 kWh |
| 100 J | 0.00002777778 kWh |
Joule ↔ Kilowatt-hour reference table
| Joule → Kilowatt-hour | Kilowatt-hour → Joule |
|---|---|
| 1 J = 2.7778e-7 kWh | 1 kWh = 3,600,000 J |
| 2 J = 5.5556e-7 kWh | 2 kWh = 7,200,000 J |
| 5 J = 0.000001388889 kWh | 5 kWh = 18,000,000 J |
| 10 J = 0.000002777778 kWh | 10 kWh = 36,000,000 J |
| 20 J = 0.000005555556 kWh | 20 kWh = 72,000,000 J |
| 50 J = 0.00001388889 kWh | 50 kWh = 180,000,000 J |
| 100 J = 0.00002777778 kWh | 100 kWh = 360,000,000 J |
| 250 J = 0.00006944444 kWh | 250 kWh = 900,000,000 J |
| 500 J = 0.0001388889 kWh | 500 kWh = 1,800,000,000 J |
| 1000 J = 0.0002777778 kWh | 1000 kWh = 3,600,000,000 J |
About joule and kilowatt-hour
Joule: The joule is the SI unit of energy — the work done by a force of one newton acting over one metre (1 J = 1 N·m), and also one watt-second.
Kilowatt-hour: A kilowatt-hour is 1,000 watt-hours — exactly 3,600,000 joules (3.6 MJ). It is the "unit" your electricity meter bills.
Frequently asked questions
- How many kilowatt-hour are in 1 joule?
- 1 joule = 2.7778e-7 kilowatt-hour (kWh).
- How do I convert joule to kilowatt-hour?
- Multiply the number of joule by 2.7778e-7. For example, 10 joule = 10 × 2.7778e-7 = 0.000002777778 kilowatt-hour.
- How many joule are in 1 kilowatt-hour?
- 1 kilowatt-hour = 3,600,000 joule.
- Which is bigger, joule or kilowatt-hour?
- 1 kilowatt-hour equals 3,600,000 joule, so a kilowatt-hour is the larger unit.