Kilocalorie (kcal)
The kilocalorie equals 1000 calories and is the familiar “Calorie” on food labels.
History: the kilocalorie appeared as a larger heat unit and became the familiar food Calorie.
Quickly convert kilocalories to kilojoules without lookup tables or manual math.
This page is focused on converting kilocalories to kilojoules. Type a number into the first field and the result appears immediately in the second field.
Example: 1 kcal = 4.184 kJ. Conversion formula: result = value × 4184 / 1000.
Use this converter for everyday calculations, study notes, engineering checks, and quick value verification without installing a separate app.
The kilocalorie equals 1000 calories and is the familiar “Calorie” on food labels.
History: the kilocalorie appeared as a larger heat unit and became the familiar food Calorie.
The kilojoule equals 1000 joules and is convenient for food energy, heat, and engineering calculations.
History: the kilojoule became a convenient multiple of the joule for food, heat, and engineering calculations.
Enter a value in the Kilocalorie field. The converter applies the formula "result = value × 4184 / 1000" and immediately shows the result in kilojoules.
1 kcal = 4.184 kJ.
Yes. Use the swap button or choose the reverse pair from the full conversion list.