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Specific Properties

MJ/kgtoBTU/lb

Convert megajoules per kilogram (MJ/kg) to British thermal units per pound (BTU/lb).

Factor1 MJ/kg = 429.9226 BTU/lb

Converter

MJ/kg

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

Result
429.923BTU/lb

Rendered to 6 significant figures.

Formula

Formula
BTU/lb = MJ/kg × 429.9226

Multiply any value in megajoules per kilogram by 429.9226 to obtain the value in British thermal units per pound.

Worked example

Convert 1 MJ/kg to BTU/lb.

  1. 01Start with 1 MJ/kg.
  2. 02Multiply by the conversion factor: 1 × 429.9226 = 429.923 BTU/lb.
Result1 MJ/kg = 429.923 BTU/lb

Conversion table

MJ/kgBTU/lb
1429.92
2859.85
52149.6
104299.2
208598.5
5021496
10042992
20085985
5002.1496e+5
10004.2992e+5

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from MJ/kg to BTU/lb?
1 MJ/kg equals 429.9226 BTU/lb. To convert, multiply the value in megajoules per kilogram by 429.9226.
How do I convert 1 MJ/kg to BTU/lb?
1 MJ/kg = 429.923 BTU/lb. For any value, multiply by 429.9226.
How do I convert BTU/lb back to MJ/kg?
Divide by the same factor — or equivalently, multiply by 0.002326. So 1 BTU/lb = 0.002326 MJ/kg.
When would I need to convert megajoule per kilogram to British thermal unit per pound?
Specific-energy conversions between MJ/kg and BTU/lb 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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