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Lean Body Mass Calculator

Estimate your lean body mass — everything except body fat — using the Boer formula.

Inputs

kg
kg

cm
cm

Saved Scenarios

— select 2+ to compare

Lean Body Mass (kg)

58.1

Remaining Mass (kg)

16.9

Spark says

How it's calculated

Formula

LBMmen=0.407W+0.267H−19.2LBMwomen=0.252W+0.473H−48.3LBM_{men} = 0.407W + 0.267H - 19.2 \quad\quad LBM_{women} = 0.252W + 0.473H - 48.3
W
— Weight in kilograms
H
— Height in centimeters

What is the Lean Body Mass Calculator?

Lean body mass is your total body weight minus fat mass — it includes muscle, bone, organs and body water. The Boer formula estimates it from weight and height alone.

How to use it

  1. 1 Select your gender.
  2. 2 Enter your weight and height.

Worked examples

Male, 75kg, 175cm

Lean body mass is about 58.0 kg.

Try it

Limitations

  • •A population-based estimate — body composition scans give a more individualized figure.

Frequently asked questions

Why does lean body mass matter?

It's often used to estimate calorie and protein needs more accurately than total body weight alone, since muscle burns more energy than fat.

Sources & references