Body Composition
Lean Body Mass Calculator
Estimate your lean body mass and body fat percentage from height, weight, and sex using the Boer formula validated against DEXA scans.
Lean body mass
135.6lb
Body fat %
24.7%
Fat mass
44.4
Protein/day
149g
The Boer formula
Men: LBM = (0.407 × kg) + (0.267 × cm) − 19.2
Women: LBM = (0.252 × kg) + (0.473 × cm) − 48.3
Body fat % = (weight − LBM) / weight × 100
The Boer equation outperforms Hume and James in DEXA-validated studies. For competition-level accuracy use a DEXA scan; for everyday tracking this is plenty.