joules to kilocalories
Convert joule to kilocalorie (food cal) — instant, free, with the formula shown.
How to convert joule to kilocalorie (food cal)
To convert joule to kilocalorie (food cal), multiply by 0.00023901:
For example, 10 J × 0.000239 = 0.00239 kcal.
J to kcal conversion table
| joules (J) | kilocalories (kcal) |
|---|---|
| 1 J | 0.000239 kcal |
| 2 J | 0.000478 kcal |
| 5 J | 0.001195 kcal |
| 10 J | 0.00239 kcal |
| 25 J | 0.005975 kcal |
| 50 J | 0.01195 kcal |
| 100 J | 0.023901 kcal |
| 250 J | 0.059751 kcal |
| 500 J | 0.119503 kcal |
| 1000 J | 0.239006 kcal |
Other joule conversions
Convert to kilocalorie (food cal) from another unit
J to kcal — frequently asked
How many kilocalories are in 1 joule?
1 joule = 0.000239 kilocalories (J × 0.000239 = kcal).
What is the formula to convert joule to kilocalorie (food cal)?
Multiply your joule value by 0.00023901 to get kilocalorie (food cal).
How do I convert 10 joules to kilocalories?
10 J = 0.00239 kcal. For 100 J the answer is 0.023901 kcal. Use the calculator on this page for any other value.
When to convert joule to kilocalorie (food cal)
Energy conversion — common questions
Is a food calorie the same as a calorie?
No — a food 'Calorie' (capital C) actually means 1 kilocalorie = 1,000 small calories = 4,184 J. Nutrition labels typically write 'cal' meaning kcal.
How many joules in 1 kWh?
1 kWh = 3,600,000 J (3.6 MJ). Because 1 kW × 1 hour = 1,000 W × 3,600 s = 3,600,000 J.
What is a BTU?
British Thermal Unit — the energy required to raise 1 pound of water by 1 °F. 1 BTU ≈ 1,055 J.