Convert Kilowatt-hours to Joules
One kilowatt-hour equals 3,600,000 joules. Type any value to convert kilowatt-hours to joules instantly — with a full reference table below.
Convert Kilowatt-hours to Joules
Converted in your browser — nothing you enter is sent anywhere.
How to convert Kilowatt-hours to Joules
To convert kilowatt-hours to joules, multiply by 3,600,000. One kilowatt-hour equals 3,600,000 J, and one joule equals 2.77778 × 10⁻⁷ kWh.
- Take the value in kilowatt-hours — for example 7.5 kWh.
- Multiply by 3,600,000 (the number of joules in one kilowatt-hour).
- 7.5 × 3,600,000 = 27,000,000 J.
Kilowatt-hours to Joules conversion table
| Kilowatt-hours | Joules |
|---|---|
| 1 kWh | 3,600,000 J |
| 2 kWh | 7,200,000 J |
| 5 kWh | 18,000,000 J |
| 10 kWh | 36,000,000 J |
| 20 kWh | 72,000,000 J |
| 50 kWh | 180,000,000 J |
| 100 kWh | 360,000,000 J |
| 200 kWh | 720,000,000 J |
| 500 kWh | 1,800,000,000 J |
| 1,000 kWh | 3,600,000,000 J |
| 2,000 kWh | 7,200,000,000 J |
| Joules | Kilowatt-hours |
|---|---|
| 1 J | 2.77778 × 10⁻⁷ kWh |
| 2 J | 5.55556 × 10⁻⁷ kWh |
| 5 J | 0.0000013889 kWh |
| 10 J | 0.0000027778 kWh |
| 20 J | 0.0000055556 kWh |
| 50 J | 0.0000138889 kWh |
| 100 J | 0.0000277778 kWh |
| 200 J | 0.0000555556 kWh |
| 500 J | 0.000138889 kWh |
| 1,000 J | 0.000277778 kWh |
| 2,000 J | 0.000555556 kWh |
About converting Kilowatt-hours to Joules
Kilowatt-hours (kWh) and Joules (J) are both units of energy. The exact factor is 1 kWh = 3,600,000 J, so multiply by 3,600,000 to go from kilowatt-hours to joules (or divide to go back).
The conversion runs entirely in your browser. Need the reverse? Use the Joules to Kilowatt-hours converter, or the full unit converter for every unit at once.
Real-world energy in kilowatt-hours and joules
| Example | Kilowatt-hours | Joules |
|---|---|---|
| One food Calorie (kcal) | 0.00116222 kWh | 4,184 J |
| A 100 W bulb running for one hour | 0.1 kWh | 360,000 J |
| A smartphone battery (≈19 Wh) | ≈ 0.01925 kWh | ≈ 69,300 J |
| A 2,000 kcal daily diet | 2.324444 kWh | 8,368,000 J |
| One kilowatt-hour | 1 kWh | 3,600,000 J |
“≈” marks typical values; the rest are defined or measured figures.
The units
1,000 watt-hours, exactly 3.6 MJ — the 'unit' on electricity bills.
Used for: Electricity bills and EV batteries.
The SI unit of energy: the work done by one newton over one metre.
Used for: Science and food labels (kJ).
The thermochemical calorie is exactly 4.184 J and a kilowatt-hour is exactly 3.6 MJ, so these factors are exact.