Calculate your body composition including body fat percentage and lean muscle mass.
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Enter Your Measurements
Results
Lean Mass
120.0
lbs
Fat Mass
30.0
lbs
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Formula
Fat Mass = Total Weight × Body Fat %; Lean Mass = Total Weight - Fat Mass
How to Use This Calculator
How to Use
- 1
Enter your total body weight.
- 2
Enter your body fat percentage.
- 3
Get your body composition breakdown.
Frequently Asked Questions
Frequently Asked Questions
What's a healthy body fat percentage?
Men: 10-20% is healthy. Women: 18-28% is healthy. Athletes: Men 6-13%, Women 14-20%.
How do I measure body fat?
Methods include calipers, bioelectrical impedance, DEXA scan, or water displacement. All have varying accuracy.
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About This Calculator
This calculator uses the formula: Fat Mass = Total Weight × Body Fat %; Lean Mass = Total Weight - Fat Mass. All calculations follow industry-standard methods. Results are estimates — always verify with a licensed professional for structural or code-compliant work.
Built and maintained by the CalcSmart team. Last updated March 2026.
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