A kilocalorie (kcal) equals 1,000 small calories and is the unit behind the food "Calorie" shown on nutrition labels.
Kilocalories to Hectojoules
Convert Kilocalorie (kcal) to Hectojoule (hJ) instantly with an exact formula, conversion table, and FAQ.
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Convert kilocalories (kcal) to hectojoules (hJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A hectojoule (hJ) is a metric-prefixed unit of energy equal to 102 joules, using the SI hecto prefix.
hJ = kcal × 41.84
Results update instantly for Kilocalories to Hectojoules conversions.
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Formula
hJ = kcal × 41.84
kcal = hJ × 0.02390057361
Conversion table
| 1 kcal | 41.840000 hJ |
| 5 kcal | 209.200000 hJ |
| 10 kcal | 418.400000 hJ |
| 20 kcal | 836.800000 hJ |
| 50 kcal | 2092 hJ |
| 100 kcal | 4184 hJ |
| 500 kcal | 20920 hJ |
| 1000 kcal | 41840 hJ |
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How the formula works
Both kilocalorie and hectojoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in kilocalories by 41.84 to get hectojoules. To reverse the conversion, multiply a hectojoule value by 0.02390057361 to get back to kilocalories.
Frequently asked questions
What is Kilocalorie (kcal)?
A kilocalorie (kcal) equals 1,000 small calories and is the unit behind the food "Calorie" shown on nutrition labels.
What is Hectojoule (hJ)?
A hectojoule (hJ) is a metric-prefixed unit of energy equal to 102 joules, using the SI hecto prefix.
How do I convert kilocalories to hectojoules?
Multiply the kilocalorie value by 41.84 to get the equivalent in hectojoules. For example, 5 kcal × 41.84 = 209.200000 hJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 41.84 is an exact, non-rounded value.
Can I convert hectojoules back to kilocalories?
Yes. Divide the hectojoule value by 41.84, or multiply it by 0.02390057361, to get kilocalories.
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About converting kilocalories to hectojoules
A kilocalorie (kcal) equals 1,000 small calories and is the unit behind the food "Calorie" shown on nutrition labels. A hectojoule (hJ) is a metric-prefixed unit of energy equal to 102 joules, using the SI hecto prefix.
Use this calculator to move between kilocalories and hectojoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.