Lean body mass calculator
Estimate lean body mass and fat mass from body weight and body fat percentage. Useful for setting protein targets and tracking body-composition changes.
Result
54.0 kg
Fat mass: 18.0 kg
Lean mass includes muscle, bone, organs and water. Many people set protein targets based on lean mass (around 2.0–2.4 g per kg of LBM) rather than total body weight.
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GudFude provides estimates and is not medical advice.
Frequently asked questions
+How do I get an accurate body fat %?
DEXA scans are the gold standard. Smart scales and tape methods are estimates — useful for tracking trends.
+Should I set protein from LBM or body weight?
Either works. For higher body-fat ranges, LBM-based targets avoid overshooting.
+Is this medical advice?
No. GudFude provides estimates and is not medical advice.