Use this free, accurate kilocalorie (food calorie) to kilojoule calculator to convert between Kilocalorie (Food Calorie) (kcal) and Kilojoule (kJ). Includes live instant results, complete mathematical formulas, conversion tables, and step-by-step examples.
4.184 Kilojoule
1 kcal is equal to 4.184 kJ.
kJ = kcal × 4.184
energy Converters
To convert from Kilocalorie (Food Calorie) to Kilojoule, multiply the value in Kilocalorie (Food Calorie) by 4.184 (or use the formula: kJ = kcal × 4.184).
Take your initial measurement in Kilocalorie (Food Calorie) (kcal). For instance, let's convert 1 kcal.
Multiply by the standard conversion factor (4.184).
The final converted measurement equals 4.184 Kilojoule (kJ).
Compare standard reference values and common conversion benchmarks.
| Kilocalorie (Food Calorie) (kcal) | Kilojoule (kJ) | Action |
|---|---|---|
| 1 kcal | 4.184 kJ | |
| 2 kcal | 8.368 kJ | |
| 3 kcal | 12.552 kJ | |
| 5 kcal | 20.92 kJ | |
| 10 kcal | 41.84 kJ | |
| 15 kcal | 62.76 kJ | |
| 20 kcal | 83.68 kJ | |
| 25 kcal | 104.6 kJ | |
| 50 kcal | 209.2 kJ | |
| 75 kcal | 313.8 kJ | |
| 100 kcal | 418.4 kJ | |
| 250 kcal | 1046 kJ | |
| 500 kcal | 2092 kJ | |
| 1000 kcal | 4184 kJ |
Official standards, measurement systems, and real-world everyday applications.
A food calorie (or kilocalorie) is equal to 1,000 small calories or 4,184 joules.
Common Practical Uses
A kilojoule is a metric unit of energy equal to 1,000 joules.
Common Practical Uses
Calculate from Kilojoule (kJ) back to Kilocalorie (Food Calorie) (kcal).
Frequently used unit conversions in this category:
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There are 4.184 kilojoules in 1 kilocalories. Exactly 1 kcal is equal to 4.184 kJ.
The conversion formula is: Kilojoule = kJ = kcal × 4.184. Applying this to 1 kcal gives: 1 × 4.184 = 4.184 kJ.
To convert in reverse from kilojoules to kilocalories, multiply by the inverse factor: 1 kJ = 0.239006 kcal. Alternatively, divide your Kilojoule amount by 4.184.
To calculate in your head, round the conversion multiplier (4.18) to the nearest easy whole or decimal number.
Kilocalorie (Food Calorie) (kcal) belongs to the Dietary / Nutrition system, commonly used in Dietary intake tracking, Food nutrition labels, Exercise calorie burn. In comparison, Kilojoule (kJ) is part of the Metric system, frequently applied in Food nutrition labels internationally, Chemical thermodynamics.
Key milestones include: 1 kcal = 4.184 kJ, 5 kcal = 20.92 kJ, 10 kcal = 41.84 kJ, 50 kcal = 209.2 kJ, and 100 kcal = 418.4 kJ.