Calories to Kilojoules
Convert calories (cal) to kilojoules (kJ).

About this conversion

Convert joules (J), calories (cal), kilowatt-hours (kWh), BTU, and other energy units. Energy is the capacity to do work; the joule (J) is the SI unit (1 J = 1 N·m). Nutritional calories and electrical kWh use different reference definitions tied to joules.

This energy converter transforms values from Calories (cal) to Kilojoules (kJ). Results update instantly using the exact conversion factor.

The calorie (cal) is a unit of energy; 1 cal ≈ 4.184 J (thermochemical calorie).

The Kilojoules (kJ) is a unit of energy in the Energy category.

Calories to Kilojoules Formula

1 cal ÷ 239.005736 = 0.004184 kJ

How to convert Calories to Kilojoules?

kJ = cal ÷ 239.005736

To convert cal to kJ, divide the value in cal by 239.005736 (since 1 cal = 0.004184 kJ). Equivalently, multiply by 0.004184. Example: 1 cal = 1 cal × 0.004184 = 0.004184 kJ.

Example: Convert 10 cal to kJ

10 cal = 0.04184 kJ ÷ 239.005736 = 10 cal

Calories to Kilojoules Conversion Table

Common values from cal to kJ.

1 cal 0.0042 kJ
2 cal 0.0084 kJ
3 cal 0.0126 kJ
4 cal 0.0167 kJ
5 cal 0.0209 kJ
6 cal 0.0251 kJ
7 cal 0.0293 kJ
8 cal 0.0335 kJ
9 cal 0.0377 kJ
10 cal 0.0418 kJ
11 cal 0.046 kJ
12 cal 0.0502 kJ
13 cal 0.0544 kJ
14 cal 0.0586 kJ
15 cal 0.0628 kJ
16 cal 0.0669 kJ
17 cal 0.0711 kJ
18 cal 0.0753 kJ
19 cal 0.0795 kJ
20 cal 0.0837 kJ

More Energy Converter options

cal Calories J Joules cal Calories kcal Kilocalories cal Calories Wh Watt Hours cal Calories kWh Kilowatt Hours cal Calories BTU Btu J Joules kJ Kilojoules kcal Kilocalories kJ Kilojoules Wh Watt Hours kJ Kilojoules kWh Kilowatt Hours kJ Kilojoules BTU Btu kJ Kilojoules