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Calories to Kilojoules Converter

Convert calories to kilojoules and back instantly with formula and common values.

cal

Kilojoules

0.0176

kJ

4.2 cal = 0.0176 kJ

kJ = cal × 0.004184

How to Convert Calories to Kilojoules

To convert calories to kilojoules, multiply by 0.004184.

Conversion Formula

  • Calories to Kilojoules: kJ = cal × 0.004184
  • Kilojoules to Calories: cal = kJ ÷ 0.004184

Common Conversions

CaloriesKilojoules
100.0418
1000.4184
10004.184
500020.92
1000041.84
50000209.2
100000418.4

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FAQ

How do I convert calories to kilojoules?

Multiply by 0.004184. For example, 4.2 cal × 0.004184 = 0.0176 kJ.

What is the formula for calories to kilojoules?

The formula is: kJ = cal × 0.004184.

How many kilojoules are in one calorie?

One calorie equals 0.0042 kilojoules.