1 J = 2.7778 × 10^−7 kWh
1 joule equals 2.7778 × 10^−7 kilowatt-hours. To convert joules to kilowatt-hours, multiply the joule value by 2.7778 × 10^−7. For quick reference: 1 J = 2.7778 × 10^−7 kWh, 5 J = 1.3889 × 10^−6 kWh, 10 J = 2.7778 × 10^−6 kWh, 100 J = 2.7778 × 10^−5 kWh.
Kilowatt-hours = Joules × 2.7778 × 10^−7Start with your value in joules.
Multiply the joule value by 2.7778 × 10^−7. This is the exact conversion factor from joules to kilowatt-hours.
The product is your value in kilowatt-hours. For example, 5 J × 2.7778 × 10^−7 = 1.3889 × 10^−6 kWh.
The exact factor from joules to kilowatt-hours is 2.7778 × 10^−7.
Kilowatt-hours = Joules × 2.7778 × 10^−7
Fifty common reference values, hand-picked for skim utility. Use the calculator above for any value not listed.
| Joules (J) | Kilowatt-hours (kWh) |
|---|---|
| 0.001 J | 2.7778 × 10^−10 kWh |
| 0.01 J | 2.7778 × 10^−9 kWh |
| 0.1 J | 2.7778 × 10^−8 kWh |
| 0.5 J | 1.3889 × 10^−7 kWh |
| 1 J | 2.7778 × 10^−7 kWh |
| 1.5 J | 4.1667 × 10^−7 kWh |
| 2 J | 5.5556 × 10^−7 kWh |
| 5 J | 1.3889 × 10^−6 kWh |
| 10 J | 2.7778 × 10^−6 kWh |
| 20 J | 5.5556 × 10^−6 kWh |
| 50 J | 1.3889 × 10^−5 kWh |
| 100 J | 2.7778 × 10^−5 kWh |
| 200 J | 5.5556 × 10^−5 kWh |
| 250 J | 6.9444 × 10^−5 kWh |
| 500 J | 0.00013889 kWh |
| 1000 J | 0.00027778 kWh |
| 2000 J | 0.00055556 kWh |
| 2500 J | 0.00069444 kWh |
| 3600 J | 0.001 kWh |
| 5000 J | 0.0013889 kWh |
| 7500 J | 0.0020833 kWh |
| 10000 J | 0.0027778 kWh |
| 25000 J | 0.0069444 kWh |
| 50000 J | 0.013889 kWh |
| 100000 J | 0.027778 kWh |
| 250000 J | 0.069444 kWh |
| 500000 J | 0.13889 kWh |
| 1000000 J | 0.27778 kWh |
| 2000000 J | 0.55556 kWh |
| 3600000 J | 1 kWh |
| 5000000 J | 1.3889 kWh |
| 10000000 J | 2.7778 kWh |
| 25000000 J | 6.9444 kWh |
| 50000000 J | 13.889 kWh |
| 100000000 J | 27.778 kWh |
| 250000000 J | 69.444 kWh |
| 500000000 J | 138.89 kWh |
| 1000000000 J | 277.78 kWh |
| 2000000000 J | 555.56 kWh |
| 5000000000 J | 1388.9 kWh |
| 10000000000 J | 2777.8 kWh |
| 20000000000 J | 5555.6 kWh |
| 50000000000 J | 13889 kWh |
| 100000000000 J | 27778 kWh |
| 1000000000000 J | 277778 kWh |
| 10000000000000 J | 2777778 kWh |
| 100000000000000 J | 27777778 kWh |
| 1000000000000000 J | 277777778 kWh |
| 10000000000000000 J | 2777777778 kWh |
| 100000000000000000 J | 27777777778 kWh |
A heartbeat releases about 1 J of mechanical work. Lifting an apple 1 m takes roughly 1 J.
The joule (J) is the SI derived unit of energy, work, and heat — defined as the energy transferred when a force of one newton acts over one meter. The joule is the standard unit in physics, chemistry, and most modern engineering documentation.
The kilowatt-hour (kWh) equals exactly 3,600,000 joules — the unit on every household electricity bill. One kWh runs a 1,000 W appliance for one hour.