1 kWh equals 3,600 kJ. To convert kWh to kJ, multiply the value by 3,600; divide by 3,600 to convert back. Enter any number above and the result appears instantly — free and entirely in your browser.
How do you convert kWh to kJ?
The conversion formula is kJ = kWh × 3,600. The conversion factor is fixed by definition, so the result is always exact.
kWh to kJ conversion table
| kWh | kJ |
|---|---|
| 1 kWh | 3,600 kJ |
| 2 kWh | 7,200 kJ |
| 5 kWh | 18,000 kJ |
| 10 kWh | 36,000 kJ |
| 100 kWh | 360,000 kJ |
| 1,000 kWh | 3,600,000 kJ |
What is kWh (kWh)?
The kilowatt-hour (kWh) is 1,000 watt-hours (3.6 MJ) and the unit on your electricity bill. A typical home uses several kWh per day.
What is kJ (kJ)?
The kilojoule (kJ) equals 1,000 joules. It is the SI energy unit on European food labels, usually shown next to kilocalories.
Why convert kWh to kJ?
Energy units come from different fields: joules and kilojoules in physics, kilocalories on food labels, kilowatt-hours on electricity bills, BTU in heating and air-conditioning. Converting between them is common for nutrition, utility bills and HVAC.
One kilocalorie (the food Calorie) equals exactly 4.184 kJ — which is why nutrition labels show both. One kilowatt-hour is 3.6 MJ, equal to about 3,412 BTU or 860 kcal (BIPM/ISO).
How to convert kWh to kJ
- Enter the value in kWh into the left field of the converter.
- Read the result in kJ instantly in the right field — it updates automatically.
- Use the swap button to reverse the direction (kJ to kWh).
The converter runs entirely in your browser: no uploads, no queue, no limits. You can even use it offline.