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Disclaimer

ShapeUpAmerica.com provides clinical-grade calculation tools for educational and informational purposes only. The results are not a substitute for professional medical advice, diagnosis, or treatment. Always consult with a licensed healthcare professional before making health-related decisions.

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CalculatorsBody & CompositionLean Body Mass (LBM)
Verified Formula
Added New

Lean Body Mass (LBM)

Calculate the mass of your body excluding fat.

Biometric Inputs

Real-time clinical computation active

Awaiting Data
--.-

Enter biometric metrics to generate report

This assessment provides statistical probability and mathematical interpretation based on validated clinical equations. It is not a diagnostic tool.

Scientific Context

Lean Body Mass represents everything in your body besides fat, including muscle, bone, and water.

Mathematical Formula

Boer Formula (Imperial Conversion)

Behind the Math

The Boer formula used here was developed in 1984 to provide a more accurate estimation of lean body mass than simple height/weight ratios, specifically for clinical dosage calculations.

Expert Tip

If you are strength training, your lean body mass should ideally stay steady or increase even as your total weight drops. This is the hallmark of 'body recomposition.'

Primary Use
Health Screening
Standard
WHO Guidelines
Complexity
Clinical Grade

Frequently Asked Questions

Metric Recommendations

Body Fat Calculator

Estimate body fat percentage via US Navy method.

BMI Calculator

Standard body mass index calculation with clinical classification.

Protein Intake Calculator

Calculate daily protein needs for your activity level.

Biological Body Age

Calculate your body's physiological age compared to your calendar age.

Longevity Predictor

Estimate your life expectancy based on biological markers and lifestyle factors.

Waist-to-Height Ratio

A simple indicator of abdominal obesity.

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