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Energy converter

Joules to Calories (J to cal)

Type in either box: it converts both ways, accepts sums like 12*3, and shows every other energy unit too.

1 J = 0.2390057361 cal. To convert joules to calories, divide the value in joules by 4.184.

How to convert joules to calories

To convert joules (J) to calories (cal), divide the value in joules by 4.184.

cal = J ÷ 4.184

Example: 10 J = 2.390057361 cal.

You can also type 10 J to cal into the smart calculator, or mix units: 1 J + 1 cal.

Joules to Calories conversion table

Joules to Calories
JoulesCalories
0.01 J0.0023900574 cal
0.1 J0.023900574 cal
0.25 J0.059751434 cal
0.5 J0.11950287 cal
1 J0.23900574 cal
2 J0.47801147 cal
3 J0.71701721 cal
4 J0.95602294 cal
5 J1.1950287 cal
6 J1.4340344 cal
7 J1.6730402 cal
8 J1.9120459 cal
9 J2.1510516 cal
10 J2.3900574 cal
12 J2.8680688 cal
15 J3.585086 cal
20 J4.7801147 cal
25 J5.9751434 cal
30 J7.1701721 cal
40 J9.5602294 cal
50 J11.950287 cal
60 J14.340344 cal
75 J17.92543 cal
100 J23.900574 cal
250 J59.751434 cal
500 J119.50287 cal
1,000 J239.00574 cal

Converting calories back to joules

1 cal = 4.184 J. See the Calories to Joules converter, or press the swap button above.

About the units

Joule (J)

The SI unit of energy: one newton acting over one meter.

Calorie (cal)

The small (thermochemical) calorie: exactly 4.184 joules.

Energy is the capacity to do work. The SI unit is the joule. Food energy is labelled in kilocalories (Calories with a capital C) or kilojoules, electricity is billed in kilowatt-hours, and heating often uses BTU or therms.

Questions and answers

How many calories are in a joule?

One joule (J) equals 0.2390057361 calories (cal).

How do I convert joules to calories?

To convert joules to calories, divide the value in joules by 4.184. The formula is cal = J ÷ 4.184. For example, 10 J = 2.3900574 cal.

What is 10 J in cal?

10 joules is 2.390057361 calories.

Which is bigger, a joule or a calorie?

A calorie is bigger: 1 cal = 4.184 J.

Are Calories on food labels the same as calories?

No. The food Calorie (capital C) is a kilocalorie: 1,000 small calories, or 4.184 kilojoules.

Does this J to cal converter work offline?

Yes. ConvertEasy is a progressive web app: after your first visit it keeps working with no connection, and you can install it to your home screen from the browser menu.