Kilocalories to Kilojoules Converter

Convert kilocalories to kilojoules (kcal to kJ) instantly with our free online converter. Accurate results with decimal precision.

All energy units in one place — try the unified converter→

kJ to kcal

Have feedback? Report bugs, suggest features, or share your thoughts — we read them all

How to convert kilocalories to kilojoules?

To convert kilocalories to kilojoules, you can use the following conversion factor: **1 kilocalorie = 4.184 kilojoules**, multiply the number of kilocalories by 4.184.

E_(kJ) = E_(kcal) × 4.184

Example

Convert 1 kcal to kilojoules:

E_(kJ) = 1kcal × 4.184 = 4.184kJ

How many kilojoules in a kilocalorie?

There are 4.184 kilojoules in one kilocalorie.

1kcal = 4.184kJ

1kcal = 4.184kJ

How many kilocalories in a kilojoule?

There are 0.239006 kilocalories in one kilojoule.

1kJ = 0.239006kcal

1kJ = 0.239006kcal

What is a Kilocalorie?

A kilocalorie (kcal) is a unit of energy equal to 1000 calories. It is commonly used in nutrition to measure the energy content of food and is often referred to as a 'Calorie' (with capital C) on food labels.

Popular kilocalories to kilojoules conversion table

Kilocalories (kcal)	Kilojoules (kJ)
0.001 kcal	0.004184 kJ
0.01 kcal	0.04184 kJ
0.1 kcal	0.4184 kJ
0.5 kcal	2.092 kJ
1 kcal	4.184 kJ
2 kcal	8.368 kJ
5 kcal	20.92 kJ
10 kcal	41.84 kJ
20 kcal	83.68 kJ
50 kcal	209.2 kJ
100 kcal	418.4 kJ