Joules to Kilowatt-hours Converter
1 joule ≈ 0.000000277777778 kilowatt-hours
1 joule equals 0.000000277778 kilowatt-hours
How to convert joules to kilowatt-hours
Calories here are thermochemical (4.184 J), while BTU uses the International Table definition. A kilowatt-hour is energy (3.6 MJ), not power; a food Calorie is a kilocalorie.
kWh = J ÷ 3600000One kilowatt-hour corresponds to 3600000 joules, so divide by that figure. Displayed constants may be rounded; the converter uses the stored factor before rounding the result.
0.00000277778 kWh ≈ 10 ÷ 3600000Joules to kilowatt-hours conversion table
Common values in joules, converted to kilowatt-hours.
| Joules (J) | Kilowatt-hours (kWh) |
|---|---|
| 1 | 0.00000027777778 |
| 2 | 0.00000055555556 |
| 3 | 0.00000083333333 |
| 4 | 0.0000011111111 |
| 5 | 0.0000013888889 |
| 10 | 0.0000027777778 |
| 20 | 0.0000055555556 |
| 25 | 0.0000069444444 |
| 50 | 0.000013888889 |
| 100 | 0.000027777778 |
| 250 | 0.000069444444 |
| 500 | 0.00013888889 |
| 1,000 | 0.00027777778 |
About these units
jouleJ
The SI derived unit of energy: one newton acting through one metre.
kilowatt-hourkWh
One kilowatt sustained for one hour: exactly 3.6 megajoules. The billing unit for electricity.
Sources and precision
Table results are rounded to 8 significant digits; formula constants may be rounded to 10. Worked example answers use 6 significant digits. The converter starts at 6 significant digits and lets you change display precision. Calculations use the stored factors without intermediate rounding. Exact unit definitions do not make an input measurement more precise; conventional and measured factors follow the assumptions stated here.