NiftyRecipe Online energy conversion
cal/MJ 0.000004 kcal/MJ 0.004184 kWh/kJ 3600 BTU/kWh 0.000293 cal/kJ 0.004184 MJ/kWh 0.277778
J / cal

1 joule in calorie

0.239006 calorie

1 J = 0.239006 cal · factor

Kilojoules and megajoules sit on the SI energy scale. This page is pure unit conversion-not a meal planner.

Enter a value and click Calculate - opens the page with the new result

Common values

calorie to joule 2 joules in calorie 5 joules in calorie 10 joules in calorie 20 joules in calorie 25 joules in calorie 50 joules in calorie 75 joules in calorie 100 joules in calorie 120 joules in calorie 150 joules in calorie

Same amount, other units

1 joule → kcal 1 joule → kJ
Formula: joule to calorie

cal = J × 0.239006 (1 J = 0.239006 CAL)

Reference values: joule → calorie
J cal
1 J 0.239006 cal
100 J 23.900574 cal
200 J 47.801147 cal
500 J 119.502868 cal
1000 J 239.005736 cal
2000 J 478.011472 cal

All amounts for this pair

FAQ for J → cal
1 joule in calorie

NiftyRecipe converts 1 joule to 0.239006 calorie with a fixed SI-linked factor.

Kilojoules and megajoules describe energy on a scientific scale. The ratio applied here is 1 joule = 0.239006 calorie, so this amount is 0.239006 calorie. Reverse check: 1 calorie ≈ 4.184 joule. That helps when a lab notebook or spreadsheet only lists one column.

Change the value in the calculator for homework, datasheets or rough process estimates. The wording stays technical on purpose so these pages read differently from food-label articles on the same site.