At One Place

Calories to joules

1 calorie in joules
1 cal = 4.184 J
J = cal × 4.184

To convert calories to joules, multiply by 4.184. The table below gives the values people look up most often, and the converter works for any number.

Calories to joules table

Common calorie values converted to joules.
Calories Joules
1 cal 4.184
2 cal 8.368
3 cal 12.552
4 cal 16.736
5 cal 20.92
10 cal 41.84
15 cal 62.76
20 cal 83.68
25 cal 104.6
30 cal 125.52
40 cal 167.36
50 cal 209.2
75 cal 313.8
100 cal 418.4
250 cal 1,046
500 cal 2,092
1,000 cal 4,184

How the conversion works

The relationship is J = cal × 4.184. Both units measure energy, so the conversion is a fixed factor that never changes.

Calorie: Thermochemical (small) calorie.

Common questions

How many joules are in one calorie?
One calorie equals 4.184 joules. J = cal × 4.184.
How do you convert calories to joules?
Use J = cal × 4.184. So 10 cal is 41.84 J.
How many calories are in one joule?
One joule equals 0.23901 calories, which is the reverse of the conversion above.
Is there more than one kind of calorie?
Thermochemical (small) calorie.

Related pages

Sources

  1. Guide for the Use of the International System of Units (SP 811) — NIST (Public domain (US Government))
  2. The International System of Units (SI Brochure) — Bureau International des Poids et Mesures
  3. Calculated on this page — At One Place

How these figures are compiled and checked