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Specific Properties

BTU/lbtoWh/kg

Convert British thermal units per pound (BTU/lb) to watt-hours per kilogram (Wh/kg).

Factor1 BTU/lb = 0.6461112 Wh/kg

Converter

BTU/lb

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

Result
64.6111Wh/kg

Rendered to 6 significant figures.

Formula

Formula
Wh/kg = BTU/lb × 0.6461112

Multiply any value in British thermal units per pound by 0.6461112 to obtain the value in watt-hours per kilogram.

Worked example

Convert 100 BTU/lb to Wh/kg.

  1. 01Start with 100 BTU/lb.
  2. 02Multiply by the conversion factor: 100 × 0.6461112 = 64.6111 Wh/kg.
Result100 BTU/lb = 64.6111 Wh/kg

Conversion table

BTU/lbWh/kg
10.64611
21.2922
53.2306
106.4611
2012.922
5032.306
10064.611
200129.22
500323.06
1000646.11

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from BTU/lb to Wh/kg?
1 BTU/lb equals 0.6461112 Wh/kg. To convert, multiply the value in British thermal units per pound by 0.6461112.
How do I convert 1 BTU/lb to Wh/kg?
1 BTU/lb = 0.646111 Wh/kg. For any value, multiply by 0.6461112.
How do I convert Wh/kg back to BTU/lb?
Divide by the same factor — or equivalently, multiply by 1.547721. So 1 Wh/kg = 1.54772 BTU/lb.
When would I need to convert British thermal unit per pound to watt-hour per kilogram?
Specific-energy conversions between BTU/lb and Wh/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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