A hectojoule (hJ) is a metric-prefixed unit of energy equal to 102 joules, using the SI hecto prefix.
Hectojoules to Kilocalories
Convert Hectojoule (hJ) to Kilocalorie (kcal) instantly with an exact formula, conversion table, and FAQ.
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Convert hectojoules (hJ) to kilocalories (kcal) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A kilocalorie (kcal) equals 1,000 small calories and is the unit behind the food "Calorie" shown on nutrition labels.
kcal = hJ × 0.02390057361
Results update instantly for Hectojoules to Kilocalories conversions.
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Formula
kcal = hJ × 0.02390057361
hJ = kcal × 41.84
Conversion table
| 1 hJ | 0.023901 kcal |
| 5 hJ | 0.119503 kcal |
| 10 hJ | 0.239006 kcal |
| 20 hJ | 0.478011 kcal |
| 50 hJ | 1.195029 kcal |
| 100 hJ | 2.390057 kcal |
| 500 hJ | 11.950287 kcal |
| 1000 hJ | 23.900574 kcal |
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How the formula works
Both hectojoule and kilocalorie measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in hectojoules by 0.02390057361 to get kilocalories. To reverse the conversion, multiply a kilocalorie value by 41.84 to get back to hectojoules.
Frequently asked questions
What is Hectojoule (hJ)?
A hectojoule (hJ) is a metric-prefixed unit of energy equal to 102 joules, using the SI hecto prefix.
What is Kilocalorie (kcal)?
A kilocalorie (kcal) equals 1,000 small calories and is the unit behind the food "Calorie" shown on nutrition labels.
How do I convert hectojoules to kilocalories?
Multiply the hectojoule value by 0.02390057361 to get the equivalent in kilocalories. For example, 5 hJ × 0.02390057361 = 0.119503 kcal.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 0.02390057361 is an exact, non-rounded value.
Can I convert kilocalories back to hectojoules?
Yes. Divide the kilocalorie value by 0.02390057361, or multiply it by 41.84, to get hectojoules.
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About converting hectojoules to kilocalories
A hectojoule (hJ) is a metric-prefixed unit of energy equal to 102 joules, using the SI hecto prefix. A kilocalorie (kcal) equals 1,000 small calories and is the unit behind the food "Calorie" shown on nutrition labels.
Use this calculator to move between hectojoules and kilocalories accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.