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Calories to Kilojoules Converter

Convert calories to kilojoules. If you're following an international recipe or nutrition guide that uses calories, this converter shows you the kilojoule equivalent used on Australian food labels.

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kcal

Results update as you type. 1 kcal = 4.184 kJ.

How It Works

To convert calories to kilojoules, multiply by 4.184. So 500 calories = approximately 2,092 kJ. The conversion factor is: 1 kcal = 4.184 kJ.

Quick Reference

Calories (kcal)Kilojoules (kJ)
100418
200837
3001,255
5002,092
1,0004,184
1,5006,276
2,0008,368
2,50010,460
3,00012,552
3,50014,644
4,00016,736
5,00020,920

Frequently Asked Questions

How many kJ in 500 calories?
500 calories equals approximately 2,092 kJ. Multiply the calorie value by 4.184 to convert to kilojoules.
What is the daily recommended kJ intake in Australia?
The average daily energy intake is approximately 8,700 kJ (2,080 kcal) for adults. However, individual needs vary based on age, gender, weight, height, and activity level.
Is 1 calorie the same as 1 kilocalorie?
In nutrition, when people say "calorie" they almost always mean kilocalorie (kcal). One kilocalorie equals 1,000 small calories. Food labels in the US list kilocalories but label them as "Calories" with a capital C.

How This Is Calculated

kJ = kcal × 4.184
kJ
= energy in kilojoules
kcal
= energy in kilocalories (food calories)
4.184
= thermochemical conversion factor

This conversion factor is defined by the International Union of Nutritional Sciences and used on all Australian food labels regulated by FSANZ.

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Disclaimer

This calculator provides estimates for informational purposes only and should not be considered medical advice. Individual results may vary based on factors not captured by these formulas. Consult a healthcare professional before making changes to your diet or exercise routine, especially if you have any existing health conditions.