Tinsley
RMR from FFM and fat mass.
When to use: Lean and fat mass are known—alternative to Katch; handy to cross-check several formulas.
Calculator
24.8×FFM + 10×FM + 284
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Estimate, not medical advice.
Formula
RMR ≈ 24.8 × FFM + 10 × FM + 284 (kcal/day). FM is fat mass in kg.