Convert Calories to Joules

Q: How many joules are in a calorie?

There are 4.184 joules in one calorie.

Q: How many calories are in a joule?

There are 0.2390057 calories in one joule.

1 calorie = 4.184 joules. Type any value below to convert in either direction — the calculation happens in your browser.

calories

joules

Calories to Joules formula

Multiply the number of calories by 4.184 to get joules.

joules = calories × 4.184

To go the other way: divide the number of joules by 4.184, or multiply by 0.2390057.

calories = joules ÷ 4.184

Calories to Joules conversion table

Calories	Joules
1 cal	4.184 J
2 cal	8.368 J
3 cal	12.552 J
4 cal	16.736 J
5 cal	20.92 J
6 cal	25.104 J
7 cal	29.288 J
8 cal	33.472 J
9 cal	37.656 J
10 cal	41.84 J
15 cal	62.76 J
20 cal	83.68 J
25 cal	104.6 J
30 cal	125.52 J
40 cal	167.36 J
50 cal	209.2 J
75 cal	313.8 J
100 cal	418.4 J
250 cal	1,046 J
500 cal	2,092 J
1,000 cal	4,184 J

Joules to Calories conversion table

Joules	Calories
1 J	0.2390057 cal
2 J	0.4780115 cal
3 J	0.7170172 cal
4 J	0.9560229 cal
5 J	1.195029 cal
6 J	1.434034 cal
7 J	1.67304 cal
8 J	1.912046 cal
9 J	2.151052 cal
10 J	2.390057 cal

About the calorie

A thermochemical calorie is exactly 4.184 joules — the energy to heat one gram of water by one degree Celsius.

About the joule

The joule is the SI unit of energy — the work done by one newton acting over one metre.

Frequently asked questions

How many joules are in a calorie?

There are 4.184 joules in one calorie.

How many calories are in a joule?

There are 0.2390057 calories in one joule.

Is this conversion exact?

The ratio between the calorie and the joule is fixed by definition, so the conversion is exact — the figures shown here are rounded for readability only.

What is 10 calories in joules?

10 calories equals 41.84 joules.

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