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A calories to joules converter converts food energy (Calories/kcal) or thermodynamic calories to joules, the SI unit of energy. Used in physics, chemistry, and international nutrition labelling.

الصيغة

J = cal × 4.184; J = kcal × 4,184
cal
Calories (cal) — Small calorie (gram calorie)
kcal
Kilocalories (kcal) — Food Calorie (kilogram calorie)
J
Joules (J) — SI unit of energy

دليل خطوة بخطوة

  1. 11 kcal (food Calorie) = 4,184 joules
  2. 21 small calorie = 4.184 joules
  3. 3Joules = kcal × 4,184
  4. 4EU food labels use kJ (kilojoules)

أمثلة محلولة

الإدخال
100 kcal (food portion)
النتيجة
418,400 joules = 418.4 kJ
الإدخال
2,000 kcal (daily intake)
النتيجة
8,368,000 joules = 8,368 kJ
الإدخال
1 calorie (small)
النتيجة
4.184 joules

أسئلة شائعة

How many joules in a food label calorie?

One food Calorie on a label (which is really 1 kcal) = 4,184 joules. A 100-calorie snack = 418,400 joules.

Why use two different calorie definitions?

Confusion arises because food labels use kcal but write "calories" without the "kilo". Scientists prefer joules to avoid ambiguity.

How much energy do I burn exercising?

Varies by activity and person. Running for 30 min might burn 300–500 food calories (1.26–2.09 million joules).

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