Use height, weight, and the biological-sex coefficient required by each legacy equation.
Calculate with the Lean Body Mass Calculator
Enter the values below. Required fields are checked before results are shown.
Lean Body Mass Calculator results
How to use the Lean Body Mass Calculator
- Select the requested method and measurement system where available.
- Enter measurements using the units shown in each label.
- Select Calculate or press Enter.
- Review the method, source, assumptions, limitations, and visible safety note.
Worked example
At 70 kg and 175 cm, supported formulas produce related but non-identical estimates.
Understanding the result
These are legacy population estimates, not measured muscle mass.
Assumptions
- The selected coefficient set is appropriate for formula comparison.
Limitations
- Equations can be inaccurate outside their source populations.
- Do not use this result for medication dosing.
Sources and method references
- Hume lean body mass equation (1966). Historical population-derived regression.
- Boer lean body mass equation (1984). Population-derived equation; individual error remains.
Frequently asked questions
Why does the legacy formula require biological sex?
The result is an educational estimate based on the selected method and entered assumptions. Individual measurements, needs, and outcomes vary.
Does CalculatorCheck store inputs from the Lean Body Mass Calculator?
No. The calculation runs locally in your browser; entries are not saved, transmitted, or added to the page URL.
Is this medical or dietary advice?
No. It does not diagnose, treat, or prescribe for any condition.