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Specific Properties

BTU/lbtokcal/kg

Convert British thermal units per pound (BTU/lb) to kilocalories per kilogram (kcal/kg).

Factor1 BTU/lb = 0.5559274 kcal/kg

Converter

BTU/lb

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

Result
55.5927kcal/kg

Rendered to 6 significant figures.

Formula

Formula
kcal/kg = BTU/lb × 0.5559274

Multiply any value in British thermal units per pound by 0.5559274 to obtain the value in kilocalories per kilogram.

Worked example

Convert 100 BTU/lb to kcal/kg.

  1. 01Start with 100 BTU/lb.
  2. 02Multiply by the conversion factor: 100 × 0.5559274 = 55.5927 kcal/kg.
Result100 BTU/lb = 55.5927 kcal/kg

Conversion table

BTU/lbkcal/kg
10.55593
21.1119
52.7796
105.5593
2011.119
5027.796
10055.593
200111.19
500277.96
1000555.93

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from BTU/lb to kcal/kg?
1 BTU/lb equals 0.5559274 kcal/kg. To convert, multiply the value in British thermal units per pound by 0.5559274.
How do I convert 1 BTU/lb to kcal/kg?
1 BTU/lb = 0.555927 kcal/kg. For any value, multiply by 0.5559274.
How do I convert kcal/kg back to BTU/lb?
Divide by the same factor — or equivalently, multiply by 1.798796. So 1 kcal/kg = 1.7988 BTU/lb.
When would I need to convert British thermal unit per pound to kilocalorie per kilogram?
Specific-energy conversions between BTU/lb and kcal/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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