Lean Body Mass Calculator

Your details

kg
cm
Boer is the most widely used. Pick "body fat %" if you have a measured reading from a scan or caliper.
Lean body mass
58.9kg / lb
Estimated fat mass16.1kg / lb
Lean percentage78.5%
Fat percentage21.5%
Boer estimate58.9kg / lb
James estimate59.8kg / lb
Hume estimate55.5kg / lb

Your estimated lean body mass is 58.9 kg, about 78% of your weight.

  • Lean body mass includes muscle, bone, organs and water, everything that is not fat.
  • This uses the Boer formula, a population estimate; the Boer, James and Hume figures above show how much the formula choice moves the number.
  • Many drug doses and protein targets scale with lean mass rather than total weight.

Next stepCompare this with a body fat estimate, which approaches the same split from the fat side.

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