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Specific Properties

kJ/kgtokcal/kg

Convert kilojoules per kilogram (kJ/kg) to kilocalories per kilogram (kcal/kg).

Factor1 kJ/kg = 0.2390057 kcal/kg

Converter

kJ/kg

Accepts numbers or expressions, e.g. 150 + 14.7

Result
23.9006kcal/kg

Rendered to 6 significant figures.

Formula

Formula
kcal/kg = kJ/kg × 0.2390057

Multiply any value in kilojoules per kilogram by 0.2390057 to obtain the value in kilocalories per kilogram.

Worked example

Convert 100 kJ/kg to kcal/kg.

  1. 01Start with 100 kJ/kg.
  2. 02Multiply by the conversion factor: 100 × 0.2390057 = 23.9006 kcal/kg.
Result100 kJ/kg = 23.9006 kcal/kg

Conversion table

kJ/kgkcal/kg
10.23901
20.47801
51.195
102.3901
204.7801
5011.95
10023.901
20047.801
500119.5
1000239.01

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from kJ/kg to kcal/kg?
1 kJ/kg equals 0.2390057 kcal/kg. To convert, multiply the value in kilojoules per kilogram by 0.2390057.
How do I convert 1 kJ/kg to kcal/kg?
1 kJ/kg = 0.239006 kcal/kg. For any value, multiply by 0.2390057.
How do I convert kcal/kg back to kJ/kg?
Divide by the same factor — or equivalently, multiply by 4.184. So 1 kcal/kg = 4.184 kJ/kg.
When would I need to convert kilojoule per kilogram to kilocalorie per kilogram?
Specific-energy conversions between kJ/kg and kcal/kg are needed in fuel-property datasheets (HHV/LHV), thermodynamic state calculations, battery energy-density comparisons, and combustion analysis. kJ/kg is the SI standard; BTU/lb is common in US fuel specifications.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).

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