Convert Kilowatt-hours to Joules
Kilowatt-hours to Joules conversion table
| Kilowatt-hours (kWh) | Joules (J) |
|---|---|
| 1 kWh | 3600000 J |
| 2 kWh | 7200000 J |
| 5 kWh | 18000000 J |
| 10 kWh | 36000000 J |
| 25 kWh | 90000000 J |
| 50 kWh | 180000000 J |
| 100 kWh | 360000000 J |
| 200 kWh | 720000000 J |
| 500 kWh | 1800000000 J |
| 1000 kWh | 3600000000 J |
How to convert kilowatt-hours to joules
Kilowatt-hours and joules measure energy at very different scales. One kilowatt-hour (kWh) — the unit on your electricity bill — equals 3,600,000 joules (3.6 MJ). A kilowatt-hour is the energy consumed by running a 1,000-watt device for one hour.
Multiply kWh by 3,600,000 to get joules. Formula: J = kWh × 3,600,000. 1 kWh = 3.6 × 10⁶ J. A 10 kWh battery = 36,000,000 J. Running a 100 W bulb for 10 hours = 1 kWh = 3,600,000 J.
Electricity cost calculations, battery capacity comparisons, and physics energy problems bridge these units.
Also: 1 kWh = 3.6 MJ = 860 kcal (food Calories). 1 joule = 1 watt × 1 second.
Related conversions
Frequently asked questions
1 kWh = 3,600,000 joules = 3.6 megajoules.
Running a 1,500 W space heater for 40 minutes, or a 10 W LED bulb for 100 hours.
Divide joules by 3,600,000. Example: 7,200,000 J ÷ 3,600,000 = 2 kWh.