NiftyRecipe Online energy conversion
BTU/cal 252.164401 BTU/kcal 0.252164 kJ/kWh 0.000278 kcal/MJ 0.004184 cal/kWh 0.000001 MJ/kcal 239.005736
kcal / J

100 kilocalories in joule

418400 joule

1 kcal = 4184 J · 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

joule to kilocalorie 1 kilocalorie in joule

Same amount, other units

100 kilocalories → kJ 100 kilocalories → cal 100 kilocalories → kWh 100 kilocalories → BTU 100 kilocalories → MJ 100 kilocalories → Wh
Formula: kilocalorie to joule

J = kcal × 4184 (1 KCAL = 4184 J)

Reference values: kilocalorie → joule
kcal J
1 kcal 4184 J
100 kcal 418400 J
200 kcal 836800 J
500 kcal 2092000 J
1000 kcal 4184000 J
2000 kcal 8368000 J

All amounts for this pair

FAQ for kcal → J
100 kilocalories in joule

NiftyRecipe converts 100 kilocalories to 418400 joule with a fixed SI-linked factor.

Kilojoules and megajoules describe energy on a scientific scale. The ratio applied here is 1 kilocalorie = 4184 joule, so this amount is 418400 joule. Reverse check: 1 joule ≈ 0.000239 kilocalorie. 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.