Lean Body Mass Calculator
Estimate lean body mass from your measurements.
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What this tool does
Estimate lean body mass from your measurements. Lean mass includes water, organs, bones and muscle; not a direct muscle mass measurement.
How to use the Lean Body Mass Calculator
- Enter or select body weight in lb.
- Enter or select body fat (%).
- Read the calculated result; change any measurement to compare alternatives.
Formula
lean mass=weight×(1−body fat/100)
- weight
- Body weight (lb, before metric conversion)
- bf
- Body fat (%)
Lean mass includes water, organs, bones and muscle; not a direct muscle mass measurement.
Worked example
For lean body mass calculator, the following measurements illustrate the exact method: Body weight: 150; Body fat (%): 20.
Inputs
- Body weight150 lb
- Body fat (%)20
Result
- Lean body mass120 lb
Results explained
- Lean body mass
- Lean body mass from the formula above, expressed in lb before metric conversion. Lean mass includes water, organs, bones and muscle; not a direct muscle mass measurement.
Frequently asked questions
lean mass=weight×(1−body fat/100)
Lean mass includes water, organs, bones and muscle; not a direct muscle mass measurement.
No. These are general-information estimates, not diagnosis, treatment, fertility advice or exercise clearance. Consult a qualified health professional.
Individual physiology, measurement technique and health conditions may cause large differences from model estimates.
No. BAC estimates never establish that driving is safe or legal; do not drive after drinking.