Kilowatt-hours to Joules Converter
1 kilowatt-hour = 3,600,000 joules
1 kilowatt-hour equals 3,600,000 joules
How to convert kilowatt-hours to joules
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.
J = kWh × 3600000One kilowatt-hour is 3600000 joules, so a single multiplication converts any value.
36,000,000 J = 10 × 3600000Kilowatt-hours to joules conversion table
Common values in kilowatt-hours, converted to joules.
| Kilowatt-hours (kWh) | Joules (J) |
|---|---|
| 1 | 3,600,000 |
| 2 | 7,200,000 |
| 3 | 10,800,000 |
| 4 | 14,400,000 |
| 5 | 18,000,000 |
| 10 | 36,000,000 |
| 20 | 72,000,000 |
| 25 | 90,000,000 |
| 50 | 180,000,000 |
| 100 | 360,000,000 |
| 250 | 900,000,000 |
| 500 | 1,800,000,000 |
| 1,000 | 3,600,000,000 |
About these units
kilowatt-hourkWh
One kilowatt sustained for one hour: exactly 3.6 megajoules. The billing unit for electricity.
jouleJ
The SI derived unit of energy: one newton acting through one metre.
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.