Calories to kJ Converter

Calories to kJ Formula

kJ = Calories × 4.184

To convert calories to kilojoules, multiply the calorie value by 4.184. This is the standard conversion used for energy values in nutrition.

For example, 500 calories × 4.184 = 2,092 kJ.

Calories to Kilojoules Conversion Examples

• 100 calories = 418.40 kJ
• 200 calories = 836.80 kJ
• 500 calories = 2,092.00 kJ
• 1,000 calories = 4,184.00 kJ
• 2,000 calories = 8,368.00 kJ
• 2,500 calories = 10,460.00 kJ

Calories and kJ on Australian Food Labels

Australian food labels commonly show energy in kilojoules (kJ). If a nutrition label, recipe, fitness app, or food database gives you calories, converting the value to kJ can make it easier to compare with the energy information shown on Australian products.

The terms calories and kilojoules describe energy, but they use different units. One food calorie (kcal) equals exactly 4.184 kilojoules.

If you are checking an Australian food label, you can enter the calorie value into the calculator above and instantly see the equivalent amount in kJ.