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Specific Properties

GJ/kgtoBTU/lb

Convert gigajoules per kilogram (GJ/kg) to British thermal units per pound (BTU/lb).

Factor1 GJ/kg = 429922.6 BTU/lb

Converter

GJ/kg

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

Result
429923BTU/lb

Rendered to 6 significant figures.

Formula

Formula
BTU/lb = GJ/kg × 429922.6

Multiply any value in gigajoules per kilogram by 429922.6 to obtain the value in British thermal units per pound.

Worked example

Convert 1 GJ/kg to BTU/lb.

  1. 01Start with 1 GJ/kg.
  2. 02Multiply by the conversion factor: 1 × 429922.6 = 429923 BTU/lb.
Result1 GJ/kg = 429923 BTU/lb

Conversion table

GJ/kgBTU/lb
14.2992e+5
28.5985e+5
52.1496e+6
104.2992e+6
208.5985e+6
502.1496e+7
1004.2992e+7
2008.5985e+7
5002.1496e+8
10004.2992e+8

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from GJ/kg to BTU/lb?
1 GJ/kg equals 429922.6 BTU/lb. To convert, multiply the value in gigajoules per kilogram by 429922.6.
How do I convert 1 GJ/kg to BTU/lb?
1 GJ/kg = 429923 BTU/lb. For any value, multiply by 429922.6.
How do I convert BTU/lb back to GJ/kg?
Divide by the same factor — or equivalently, multiply by 2.326e-6. So 1 BTU/lb = 2.326e-6 GJ/kg.
When would I need to convert gigajoule per kilogram to British thermal unit per pound?
Specific-energy conversions between GJ/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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