Calories to Joules

One calorie is 4.184 joules. Energy units for food, electricity and physics. The "calorie" on a nutrition label is a kilocalorie — 1,000 of the calories used in physics.

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From

To4.184

1 calorie = 4.184 joules · open this conversion

Formula

joules = calories × 4.184

A food Calorie (capital C) is a kilocalorie. The thermochemical calorie of 4.184 J is used here.

Calories to Joules table

Calories	Joules
1 cal	4.184 J
2 cal	8.368 J
5 cal	20.92 J
10 cal	41.84 J
20 cal	83.68 J
25 cal	104.6 J
50 cal	209.2 J
100 cal	418.4 J
150 cal	627.6 J
200 cal	836.8 J
250 cal	1,046 J
300 cal	1,255.2 J
400 cal	1,673.6 J
500 cal	2,092 J
600 cal	2,510.4 J
800 cal	3,347.2 J
1,000 cal	4,184 J
1,500 cal	6,276 J
2,000 cal	8,368 J
2,500 cal	10,460 J

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Other energy conversions

⇄ Joules to Calories Calories to Kilojoules Calories to Kilocalories Calories to Watt hours Calories to Kilowatt hours

Frequently asked questions

▸How many joules are in a calorie?

One calorie is 4.184 joules. joules = calories × 4.184.

▸How do I convert calories to joules?

Multiply the number of calories by 4.184. For example, 10 cal × 4.184 = 41.84 J.

▸What is the difference between calories and joules?

Calorie (cal) and Joule (J) both measure energy. Energy units for food, electricity and physics. The "calorie" on a nutrition label is a kilocalorie — 1,000 of the calories used in physics.

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