Lean Body Mass Calculator

The Lean Body Mass Calculator gives out the estimated Lean Body Mass (LBM) based on body weight, height, gender, and age. The Lean Body Mass Calculator provides the results of all the popular formulas for comparison purposes.

Height feet inchs
Weight pounds
Height centimeters
Weight kilograms


The Boer Formula Result: 127.4 lbs
The James Formula Result: 129.0 lbs
The Hume Formula Result: 120.4 lbs

RelatedBody Fat Calculator | Army Body Fat Calculator | BMI Calculator


The Lean Body Mass (LBM) is a part of the body. It is normally defined to be the body weight minus the body fat. Typically lean body mass is 60-90% of the total body mass. Normally, men have higher port of lean body mass than women. Some anaesthetic agents dosage, especially water-soluble drugs, are routinely based on the lean body mass value. Many formulas have been developed in the past for the estimation of the lean body mass. The following are some of them. This calculator gives out result for all the fitting formulas.

Lean Body Mass Formula for Adults

The Boer Formula:

The James Formula:

The Hume Formula:

Lean Body Mass Formula for Children

The Peters Formula: