kcal to J Converter - Kilocalorie to Joule

Kilocalorie (kcal) to Joule (J)

Direct answer

1 kcal = 4,184 J

J = kcal × 4,184

Converter

Input

kcal

Result

4,184J

J = kcal × 4,184

kcal = J × 0.000239005736

Example: 10 kcal = 10 × 4,184 = 41,840 J.

Express both kcal and J in the same base unit J (joule), then cancel the shared base unit.

1
Rewrite kcal in the base unit
$1 kcal = 4, 184 J$
2
Rewrite J in the base unit
$1 J = 1 J$
3
Forward conversion
$1 kcal = \frac{4 , 184 J}{1 J} \times 1 J = \frac{4 , 184}{1} J = 4, 184 J$
4
Reverse conversion
$1 J = \frac{1 J}{4 , 184 J} \times 1 kcal = \frac{1}{4 , 184} kcal = 0.000239005736 kcal$

A guarded explanation for this pair page covering definition, principle, assumptions, and cautions.

Guarded output

AI text is for interpretation only. The page calculator remains the source of truth for numeric results.

1 kcal = 4,184 J.

10 kcal = 41,840 J.

100 kcal = 418,400 J.

Use J = kcal × 4,184.

1 J = 0.000239005736 kcal.

Use the conversion factor and round the result to the precision required by your calculation.