Calories to Kilojoules Calculator

Convert between calories and kilojoules for accurate food energy measurements.

From Unit Calories (cal) Kilocalories (kcal) Kilojoules (kJ) Joules (J)

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To Unit Calories (cal) Kilocalories (kcal) Kilojoules (kJ) Joules (J)

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About Energy Units

Our Calories to Kilojoules Calculator helps you convert between different energy units used in nutrition and food science.

Common Energy Units

• Calories (cal): Standard unit of energy measurement
• Kilocalories (kcal): Standard unit of energy measurement
• Kilojoules (kJ): Standard unit of energy measurement
• Joules (J): Standard unit of energy measurement

Conversion Factors

• 1 calorie = 4.184 joules
• 1 kilocalorie = 4.184 kilojoules
• 1 kilojoule = 1000 joules
• 1 kilocalorie = 1000 calories

Usage Tips

• Calories are commonly used in the US and UK
• Kilojoules are used in Australia and Europe
• Food labels often show both units
• Scientific work typically uses joules