Health & Fitness Calculators

Lean Body Mass Calculator

Enter your sex, weight, and height to calculate an estimated lean body mass using the Boer formula.

Lean body mass

61.4 kg

Estimated fat mass

18.6 kg

Uses the Boer formula, a widely used estimate of lean body mass from weight and height. It's a population average estimate, not a substitute for a direct body composition measurement (DEXA, BIA, etc.).

How to use this tool

  1. 1Select your sex.
  2. 2Enter your weight in kilograms.
  3. 3Enter your height in centimeters.
  4. 4See your estimated lean body mass and fat mass.

Frequently asked questions

How is this different from body fat percentage?+

Body fat percentage gives a percentage of total weight that's fat; this gives an estimated absolute weight of everything that isn't fat (muscle, bone, organs, water).

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