Lean Body Mass Calculator

Estimate your lean body mass based on total body weight and body fat percentage. You can also view estimated fat mass and body composition split.

Use your current total body weight.
Use your best body fat estimate.
Used only for general interpretation text.
Changes the practical interpretation only.
Choose how results should be displayed.
Choose result precision.
How we calculate

Lean body mass is estimated as total body weight × (1 − body fat %). Fat mass is estimated as total body weight × body fat %.