About the Joule Converter
Convert joules (J) to calories (cal) instantly. Includes the exact conversion factor, formula and a quick reference table.
Also known as: J to cal, Joules to Calories, convert Joules to Calories, j to cal, joules to calories, j to kj.
How to use this calculator
- Enter value in joules.
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Open “Step-by-step” to see how the answer was worked out.
- Use Copy result or Share to save the answer or send a link with your inputs.
Formula
cal = J × 0.2390057361
Worked example
Using the values pre-filled in the calculator above:
- Value in joules = 1,000 J
the calculator returns:
- Calories: 239.005736 cal
- Kilojoules: 1 kJ
- Megajoules: 0.001 MJ
- Kilocalories (food Calories): 0.239006 kcal
Working
1,000 J × 0.2390057361 = 239.00573614 cal