Calories to Joules

1 cal = 4.184 J

How to convert calories to joules

J = cal × 4.184

Example: 5 cal = 20.92 J

Calories to Joules conversion table

Calories (cal)Joules (J)
1 cal4.184 J
2 cal8.368 J
3 cal12.552 J
4 cal16.736 J
5 cal20.92 J
6 cal25.104 J
7 cal29.288 J
8 cal33.472 J
9 cal37.656 J
10 cal41.84 J
15 cal62.76 J
20 cal83.68 J
25 cal104.6 J
30 cal125.52 J
40 cal167.36 J
50 cal209.2 J
75 cal313.8 J
100 cal418.4 J
250 cal1,046 J
500 cal2,092 J
1,000 cal4,184 J

About the units

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

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

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Frequently asked questions

How many joules are in 1 calorie?

1 calorie equals 4.184 joules.

How many calories are in 1 joule?

1 joule equals 0.2390057 calories.

How do I convert calories to joules?

Use the formula J = cal × 4.184.

What is 10 calories in joules?

10 calories equals 41.84 joules.

Related conversions

Sources

Conversion factors use the exact definitions published by NIST and the BIPM, and are checked by automated tests against those definitions.

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