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Specific Properties

MJ/kgtocal/kg

Convert megajoules per kilogram (MJ/kg) to calories per kilogram (cal/kg).

Factor1 MJ/kg = 239005.7 cal/kg

Converter

MJ/kg

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

Result
239006cal/kg

Rendered to 6 significant figures.

Formula

Formula
cal/kg = MJ/kg × 239005.7

Multiply any value in megajoules per kilogram by 239005.7 to obtain the value in calories per kilogram.

Worked example

Convert 1 MJ/kg to cal/kg.

  1. 01Start with 1 MJ/kg.
  2. 02Multiply by the conversion factor: 1 × 239005.7 = 239006 cal/kg.
Result1 MJ/kg = 239006 cal/kg

Conversion table

MJ/kgcal/kg
12.3901e+5
24.7801e+5
51.1950e+6
102.3901e+6
204.7801e+6
501.195e+7
1002.3901e+7
2004.7801e+7
5001.195e+8
10002.3901e+8

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from MJ/kg to cal/kg?
1 MJ/kg equals 239005.7 cal/kg. To convert, multiply the value in megajoules per kilogram by 239005.7.
How do I convert 1 MJ/kg to cal/kg?
1 MJ/kg = 239006 cal/kg. For any value, multiply by 239005.7.
How do I convert cal/kg back to MJ/kg?
Divide by the same factor — or equivalently, multiply by 4.184e-6. So 1 cal/kg = 4.184e-6 MJ/kg.
When would I need to convert megajoule per kilogram to calorie per kilogram?
Specific-energy conversions between MJ/kg and cal/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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