Lean Body Mass Calculator
Estimate lean body mass using the Boer formula from weight, height, and sex.
How to Use the Lean Body Mass Calculator
- Enter the required values into the input fields.
- Click the Calculate button to see the results.
- Review the output values and interpretations below.
Quick Reference
| From | To |
|---|---|
| Men — Essential fat | 2–5% |
| Men — Athletes | 6–13% |
| Men — Fitness | 14–17% |
| Women — Essential fat | 10–13% |
| Women — Athletes | 14–20% |
Use Cases
- •Monitoring personal health metrics and tracking changes over time.
- •Supporting clinical decision-making with quick formula-based estimates.
- •Educational use for students learning health and fitness calculations.
Formula
Formula: Boer formula — Male: LBM = 0.407×W + 0.267×H − 19.2. Female: LBM = 0.252×W + 0.473×H − 48.3.
Frequently Asked Questions
What is lean body mass?
Lean body mass (LBM) is your total body weight minus fat mass. It includes muscles, bones, organs, and water.
Why is the Boer formula used?
The Boer formula (1984) provides a good estimate of LBM from just weight and height, without requiring body fat measurements. It accounts for sex differences.
What is a healthy body fat percentage?
For men: 10-20% is healthy. For women: 18-28% is healthy. Athletes may have lower levels: 6-13% (men) and 14-20% (women).