Cum se calculează Calories to Joules
Ce este Calories to Joules?
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.
Formulă
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
Ghid pas cu pas
- 11 kcal (food Calorie) = 4,184 joules
- 21 small calorie = 4.184 joules
- 3Joules = kcal × 4,184
- 4EU food labels use kJ (kilojoules)
Exemple rezolvate
Intrare
100 kcal (food portion)
Rezultat
418,400 joules = 418.4 kJ
Intrare
2,000 kcal (daily intake)
Rezultat
8,368,000 joules = 8,368 kJ
Intrare
1 calorie (small)
Rezultat
4.184 joules
Întrebări frecvente
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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