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Specific Properties

kcal/kgtoJ/kg

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

Factor1 kcal/kg = 4184 J/kg

Converter

kcal/kg

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

Result
4184J/kg

Rendered to 6 significant figures.

Formula

Formula
J/kg = kcal/kg × 4184

Multiply any value in kilocalories per kilogram by 4184 to obtain the value in joules per kilogram.

Worked example

Convert 1 kcal/kg to J/kg.

  1. 01Start with 1 kcal/kg.
  2. 02Multiply by the conversion factor: 1 × 4184 = 4184 J/kg.
Result1 kcal/kg = 4184 J/kg

Conversion table

kcal/kgJ/kg
14184
28368
520920
1041840
2083680
502.0920e+5
1004.1840e+5
2008.3680e+5
5002.0920e+6
10004.1840e+6

Reference values rounded to 5 significant figures for display.

FAQ

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