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joules to kcal converter

1 joule equals 0.0002390057 kilocalories (food calories). Conversions use kcal = J × 0.000239

J → 0.0002390057 kcal

kcal = J × 0.000239

Converter

Worked examples

1 J = 0.0002390057 kcal
2 J = 0.0004780115 kcal
5 J = 0.0011950287 kcal
10 J = 0.0023900574 kcal
100 J = 0.02390057 kcal

joules to kilocalories (food calories) conversion table

J	kcal	Arithmetic
1 J	0.0002390057 kcal	× 0.000239
2 J	0.0004780115 kcal	× 0.000239
3 J	0.0007170172 kcal	× 0.000239
4 J	0.0009560229 kcal	× 0.000239
5 J	0.0011950287 kcal	× 0.000239
6 J	0.0014340344 kcal	× 0.000239
8 J	0.0019120459 kcal	× 0.000239
10 J	0.0023900574 kcal	× 0.000239
12 J	0.0028680688 kcal	× 0.000239
15 J	0.003585086 kcal	× 0.000239
20 J	0.0047801147 kcal	× 0.000239
25 J	0.0059751434 kcal	× 0.000239
30 J	0.0071701721 kcal	× 0.000239
40 J	0.0095602294 kcal	× 0.000239
50 J	0.01195029 kcal	× 0.000239
60 J	0.01434034 kcal	× 0.000239
70 J	0.0167304 kcal	× 0.000239
80 J	0.01912046 kcal	× 0.000239
90 J	0.02151052 kcal	× 0.000239
100 J	0.02390057 kcal	× 0.000239

How to convert J to kcal

Take your value in joules.
Multiply by 0.000239
That is your answer in kilocalories (food calories) — no rounding needed until you choose a display precision.

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

Questions

How many kilocalories (food calories) in 1 joule?

Exactly 0.0002390057 kcal. The factor follows from the definitions of both units, not from a measurement, so it is exact.

How do I convert J to kcal?

Multiply the joules figure by 0.000239 — or use the converter above, which updates as you type.

Is J to kcal the same as kcal to J?

No — they are inverses. One J is 0.0002390057 kcal, while one kcal is 4,184 J.

What is 1 J in kcal?

1 J = 0.0002390057 kcal (see the value page for the full arithmetic).