BodyMetricPrecision Health & Fitness
Calories & BMR

Cunningham RMR Calculator

Calculate resting energy expenditure directly from Fat-Free Mass (FFM)

Input Parameters
%
Real-time calculation updates dynamically as you adjust inputs. Values remain strictly local on your device.
Cunningham RMRLean Mass Calibrated
2014kcal/day

Based on 68.8 kg of fat-free mass

Fat-Free Mass
68.8kg
Resting Burn / Hour
84kcal/h
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: Cunningham RMR Equation (1980)

RMR = 500 + 22 × Fat-Free Mass (kg)

Demonstrated that lean tissue accounts for the overwhelming majority of basal heat production, eliminating gender-based differences.

Model Assumptions

  • Known body fat percentage

Variables & Standard Units

SymbolPhysiological MeaningUnit
FFMFat-Free Mass (Lean Body Mass)kg

Scientific Limitations

  • Requires accurate body composition estimation

Peer-Reviewed Scientific Citations

A reanalysis of the factors influencing basal metabolic rate in normal adults: importance of fat-free mass (1980)

Cunningham JJ (1980) — The American Journal of Clinical Nutrition, 33(11), 2372-2374

Key Finding: Demonstrated that lean body mass accounts for nearly all variance in basal metabolic rate between sexes and ages.

Frequently Asked Questions

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