How do I convert calories to joules?

Multiply the number of calories by 4.184. For example, 5 cal = 20.92 J.

How many joules are in one calorie?

One calorie equals 4.184 joules.

12 calories equals 50.208 joules.

Use the reverse Joules to Calories converter: multiply joules by 0.2390057361.

Convert calories (cal) to joules (J) instantly — type a value below.

1 calorie (cal) = 4.184 joules (J)
1 joule (J) = 0.2390057361 calories (cal)

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To convert calories to joules, use this formula:

J = cal × 4.184 (or divide by 0.2390057361)

The (thermochemical) small calorie is exactly 4.184 joules: about the energy needed to warm 1 gram of water by 1 °C.

The joule is the SI unit of energy: the work done by a force of one newton over one meter.

How do I convert calories to joules?: Multiply the number of calories by 4.184. For example, 5 cal = 20.92 J.
How many joules are in one calorie?: One calorie equals 4.184 joules.
What is 12 cal in joules?: 12 calories equals 50.208 joules.
How do I convert joules back to calories?: Use the reverse Joules to Calories converter: multiply joules by 0.2390057361.

Need other units? Use the full energy converter.