At One Place

Joules to kilocalories

1 joule in kilocalories
1 J = 0.000239 kcal
kcal = J × 0.000239005736

To convert joules to kilocalories, multiply by 0.000239005736. The table below gives the values people look up most often, and the converter works for any number.

Joules to kilocalories table

Common joule values converted to kilocalories.
Joules Kilocalories
1 J 0.000239
2 J 0.000478
3 J 0.000717
4 J 0.000956
5 J 0.001195
10 J 0.0023901
15 J 0.0035851
20 J 0.0047801
25 J 0.0059751
30 J 0.0071702
40 J 0.0095602
50 J 0.01195
75 J 0.017925
100 J 0.023901
250 J 0.059751
500 J 0.1195
1,000 J 0.23901

How the conversion works

The relationship is kcal = J × 0.000239005736. Both units measure energy, so the conversion is a fixed factor that never changes.

Kilocalorie: The "calorie" on food labels.

Common questions

How many kilocalories are in one joule?
One joule equals 0.000239 kilocalories. kcal = J × 0.000239005736.
How do you convert joules to kilocalories?
Use kcal = J × 0.000239005736. So 10 J is 0.0023901 kcal.
How many joules are in one kilocalorie?
One kilocalorie equals 4,184 joules, which is the reverse of the conversion above.
Is there more than one kind of kilocalorie?
The "calorie" on food labels.

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