joules to calories
Convert joule to calorie (small) — instant, free, with the formula shown.
1 J=0.239006 cal
How to convert joule to calorie (small)
To convert joule to calorie (small), multiply by 0.23900574:
cal = J × 0.23900574
For example, 10 J × 0.239006 = 2.390057 cal.
J to cal conversion table
| joules (J) | calories (cal) |
|---|---|
| 1 J | 0.239006 cal |
| 2 J | 0.478011 cal |
| 5 J | 1.195029 cal |
| 10 J | 2.390057 cal |
| 25 J | 5.975143 cal |
| 50 J | 11.950287 cal |
| 100 J | 23.900574 cal |
| 250 J | 59.751434 cal |
| 500 J | 119.502868 cal |
| 1000 J | 239.005736 cal |
Other joule conversions
Convert to calorie (small) from another unit
J to cal — frequently asked
How many calories are in 1 joule?
1 joule = 0.239006 calories (J × 0.239006 = cal).
What is the formula to convert joule to calorie (small)?
Multiply your joule value by 0.23900574 to get calorie (small).
How do I convert 10 joules to calories?
10 J = 2.390057 cal. For 100 J the answer is 23.900574 cal. Use the calculator on this page for any other value.
When to convert joule to calorie (small)
1Electricity bills (kWh)
2Nutrition labels (kcal / food cal)
3HVAC and heating (BTU, therms)
4Physics and chemistry (J, eV)
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.
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