Energy Converter
Convert between joules (J), kilowatt-hours (kWh), and kilocalories (kcal). 1 kWh = 3.6e6 J; 1 kcal ≈ 4184 J.
Convert energy
Enter value and click Convert.
How it works
We convert to joules then to the target unit. 1 kWh = 3,600,000 J; 1 kcal (food calorie) ≈ 4184 J.
When to use it
Use for electricity bills (kWh), nutrition (kcal), or physics (J).
Frequently asked questions
- Calorie vs kcal? Food labels use kcal (often written "Calorie"). 1 kcal = 1000 cal.