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Specific Properties

J/kgtokcal/kg

Convert joules per kilogram (J/kg) to kilocalories per kilogram (kcal/kg).

Factor1 J/kg = 0.0002390057 kcal/kg

Converter

J/kg

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

Result
1kcal/kg

Rendered to 6 significant figures.

Formula

Formula
kcal/kg = J/kg × 0.0002390057

Multiply any value in joules per kilogram by 0.0002390057 to obtain the value in kilocalories per kilogram.

Worked example

Convert 4184 J/kg to kcal/kg.

  1. 01Start with 4184 J/kg.
  2. 02Multiply by the conversion factor: 4184 × 0.0002390057 = 1 kcal/kg.
Result4184 J/kg = 1 kcal/kg

Conversion table

J/kgkcal/kg
10.00023901
20.00047801
50.001195
100.0023901
200.0047801
500.01195
1000.023901
2000.047801
5000.1195
10000.23901

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from J/kg to kcal/kg?
1 J/kg equals 0.0002390057 kcal/kg. To convert, multiply the value in joules per kilogram by 0.0002390057.
How do I convert 1 J/kg to kcal/kg?
1 J/kg = 0.000239006 kcal/kg. For any value, multiply by 0.0002390057.
How do I convert kcal/kg back to J/kg?
Divide by the same factor — or equivalently, multiply by 4184. So 1 kcal/kg = 4184 J/kg.
When would I need to convert joule per kilogram to kilocalorie per kilogram?
Specific-energy conversions between J/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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