Formula guide

Lean Body Mass Calculator formula

This tool uses a standard estimation formula that updates instantly as you change the inputs.

How the input values are used

Sex

The selected option determines the method or unit used.

Weight (kg)

The numeric value in kg is used in the calculation; keep units consistent.

Body fat (%)

The numeric value in % is used in the calculation; keep units consistent.

How to interpret the result

  • The result uses Sex and Weight (kg). Change one variable at a time to compare its effect on the outcome.
  • Health and fitness values are estimates, not a substitute for measurements or clinical advice.
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