Body Composition & Desired Body Weight

Compute fat mass, lean mass, and the desired body weight at your target body fat percentage. All calculations run locally in your browser.

Ready
AssumptionsLean mass kept constant unless specified
Desired Body Weight (DBW)DBW = Lean / (1 − Target BF)
UnitsMetric
Rounding1 decimal (kg), 0.1% (BF)
Notes. Desired Body Weight uses the standard equation DBW = Lean Mass ÷ (1 − Target BF%). Lean mass is held constant unless you specify an expected change (e.g., building muscle during a surplus). This tool is for educational use only and does not account for individual medical factors.