Convert Joules to Calories

Q: How many calories are in a joule?

There are 0.2390057 calories in one joule.

Q: How many joules are in a calorie?

There are 4.184 joules in one calorie.

1 joule = 0.2390057 calories. Type any value below to convert in either direction — the calculation happens in your browser.

joules

calories

Joules to Calories formula

Multiply the number of joules by 0.2390057 to get calories.

calories = joules × 0.2390057

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

joules = calories ÷ 0.2390057

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
15 J	3.585086 cal
20 J	4.780115 cal
25 J	5.975143 cal
30 J	7.170172 cal
40 J	9.560229 cal
50 J	11.950287 cal
75 J	17.92543 cal
100 J	23.900574 cal
250 J	59.751434 cal
500 J	119.502868 cal
1,000 J	239.005736 cal

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

About the joule

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

About the calorie

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

Frequently asked questions

How many calories are in a joule?

There are 0.2390057 calories in one joule.

How many joules are in a calorie?

There are 4.184 joules in one calorie.

Is this conversion exact?

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

What is 10 joules in calories?

10 joules equals 2.390057 calories.

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