Joules to Calories

1 J = 0.2390057 cal

How to convert joules to calories

cal = J × 0.2390057

Equivalently: cal = J ÷ 4.184.

Example: 5 J = 1.195029 cal

Joules to Calories conversion table

Joules (J)Calories (cal)
1 J0.2390057 cal
2 J0.4780115 cal
3 J0.7170172 cal
4 J0.9560229 cal
5 J1.195029 cal
6 J1.434034 cal
7 J1.67304 cal
8 J1.912046 cal
9 J2.151052 cal
10 J2.390057 cal
15 J3.585086 cal
20 J4.780115 cal
25 J5.975143 cal
30 J7.170172 cal
40 J9.560229 cal
50 J11.95029 cal
75 J17.92543 cal
100 J23.90057 cal
250 J59.75143 cal
500 J119.5029 cal
1,000 J239.0057 cal

About the units

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

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

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Frequently asked questions

How many calories are in 1 joule?

1 joule equals 0.2390057 calories.

How many joules are in 1 calorie?

1 calorie equals 4.184 joules.

How do I convert joules to calories?

Use the formula cal = J × 0.2390057. Equivalently, cal = J ÷ 4.184.

What is 10 joules in calories?

10 joules equals 2.390057 calories.

Related conversions

Factors: NIST SP 811 · SI Brochure · NIST Handbook 44 — Updated