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Specific Properties

BTU/lbtoGJ/kg

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

Factor1 BTU/lb = 2.326e-6 GJ/kg

Converter

BTU/lb

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

Result
2.326GJ/kg

Rendered to 6 significant figures.

Formula

Formula
GJ/kg = BTU/lb × 2.326e-6

Multiply any value in British thermal units per pound by 2.326e-6 to obtain the value in gigajoules per kilogram.

Worked example

Convert 1.00000e+6 BTU/lb to GJ/kg.

  1. 01Start with 1.00000e+6 BTU/lb.
  2. 02Multiply by the conversion factor: 1.00000e+6 × 2.326e-6 = 2.326 GJ/kg.
Result1.00000e+6 BTU/lb = 2.326 GJ/kg

Conversion table

BTU/lbGJ/kg
12.326e-6
24.652e-6
51.163e-5
102.326e-5
204.652e-5
500.0001163
1000.0002326
2000.0004652
5000.001163
10000.002326

Reference values rounded to 5 significant figures for display.

FAQ

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