Calories to Joules (cal to J)

Convert calories to joules instantly. 1 calorie = 4.184 joules, so multiply by 4.184. Includes worked examples and a full cal to J table.

How to convert calories to joules

1 calorie = 4.184 joules and 1 joule = 0.2390057361 calories. To convert calories to joules, multiply by 4.184:

J = cal × 4.184

Examples

  • 1 cal × 4.184 = 4.184 J
  • 100 cal × 4.184 = 418.4 J
  • 1,000 cal × 4.184 = 4,184 J

cal to J conversion table

Calories (cal)Joules (J)
1 cal4.184 J
2 cal8.368 J
3 cal12.552 J
4 cal16.736 J
5 cal20.92 J
6 cal25.104 J
7 cal29.288 J
8 cal33.472 J
9 cal37.656 J
10 cal41.84 J
12 cal50.208 J
15 cal62.76 J
20 cal83.68 J
25 cal104.6 J
30 cal125.52 J
40 cal167.36 J
50 cal209.2 J
60 cal251.04 J
70 cal292.88 J
75 cal313.8 J
80 cal334.72 J
90 cal376.56 J
100 cal418.4 J
150 cal627.6 J
200 cal836.8 J
250 cal1,046 J
500 cal2,092 J
1,000 cal4,184 J
5,000 cal20,920 J
10,000 cal41,840 J

What is a calorie?

A (small) calorie is 4.184 joules, the energy to warm 1 gram of water by 1 °C.

What is a joule?

The joule is the SI unit of energy: the work done by a force of one newton over one metre, or one watt for one second.

Related conversions

Joules to caloriesKilowatt-hours (units) to joulesJoules to kilowatt-hours (units)British thermal units to joulesElectronvolts to joulesAll energy units

Frequently asked questions

How do I convert calories to joules?

Multiply the value in calories by 4.184. 1 calorie = 4.184 joules.

How many calories are in one joule?

1 joule = 0.2390057361 calories.

What is 100 cal in J?

100 cal = 418.4 J.

What is 1,000 cal in J?

1,000 cal = 4,184 J.