BodyMetricPrecision Health & Fitness
Calories & BMR

Katch-McArdle BMR Calculator

Calculate BMR using the Katch-McArdle lean mass equation

Input Parameters
%
Real-time calculation updates dynamically as you adjust inputs. Values remain strictly local on your device.
Katch-McArdle BMRLBM Specific
1802kcal/day

Derived from 66.3 kg of lean body mass

Lean Body Mass
66.3kg
Clinical Responsibility Note: This calculation provides statistical estimations for informational and educational purposes only. It is not an individualized medical diagnosis or clinical prescription.

Mathematical Formula & Scientific Methodology

Formula: Katch-McArdle Formula (1983)

BMR = 370 + 21.6 × LBM (kg)

Applies a linear coefficient to lean tissue without incorporating age or height variables, as lean tissue explains age-related metabolic drops.

Model Assumptions

  • Known body fat percentage

Variables & Standard Units

SymbolPhysiological MeaningUnit
LBMLean Body Masskg

Scientific Limitations

  • Relies on accurate body fat measurement

Peer-Reviewed Scientific Citations

Nutrition, Weight Control, and Exercise (1983)

Katch FI, McArdle WD (1983) — Lea & Febiger, Philadelphia

Key Finding: BMR equation derived directly from Fat-Free Mass (FFM), providing superior accuracy for athletes with known body fat percentage.

Frequently Asked Questions

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