calories to joules converter

1 calorie equals 4.184 joules. Conversions use J = cal × 4.184

cal → 4.184 J

J = cal × 4.184

Converter

Worked examples

1 cal = 4.184 J
2 cal = 8.368 J
5 cal = 20.92 J
10 cal = 41.84 J
100 cal = 418.4 J

calories to joules conversion table

cal	J	Arithmetic
1 cal	4.184 J	× 4.184
2 cal	8.368 J	× 4.184
3 cal	12.552 J	× 4.184
4 cal	16.736 J	× 4.184
5 cal	20.92 J	× 4.184
6 cal	25.104 J	× 4.184
8 cal	33.472 J	× 4.184
10 cal	41.84 J	× 4.184
12 cal	50.208 J	× 4.184
15 cal	62.76 J	× 4.184
20 cal	83.68 J	× 4.184
25 cal	104.6 J	× 4.184
30 cal	125.52 J	× 4.184
40 cal	167.36 J	× 4.184
50 cal	209.2 J	× 4.184
60 cal	251.04 J	× 4.184
70 cal	292.88 J	× 4.184
80 cal	334.72 J	× 4.184
90 cal	376.56 J	× 4.184
100 cal	418.4 J	× 4.184

How to convert cal to J

Take your value in calories.
Multiply by 4.184
That is your answer in joules — no rounding needed until you choose a display precision.

Related conversions

J to cal J to kJ J to kcal J to Wh J to kWh J to Btu kJ to J cal to kJ cal to kcal all energy units

Questions

How many joules in 1 calorie?

Exactly 4.184 J. The factor follows from the definitions of both units, not from a measurement, so it is exact.

How do I convert cal to J?

Multiply the calories figure by 4.184 — or use the converter above, which updates as you type.

Is cal to J the same as J to cal?

No — they are inverses. One cal is 4.184 J, while one J is 0.23900574 cal.

What is 1 cal in J?

1 cal = 4.184 J (see the value page for the full arithmetic).