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ShapeUpAmerica.com is for informational purposes only. The calculators and tools provided are not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions regarding a medical condition.

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CalculatorsBody CompositionRelative Fat Mass (RFM)
Verified Formula

Relative Fat Mass (RFM)

A simpler, clinical alternative to BMI.

Biometric Inputs

Real-time clinical computation active

Awaiting Data
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Enter biometric metrics to generate report

This assessment provides statistical probability and mathematical interpretation based on validated clinical equations. It is not a diagnostic tool.

Scientific Context

The Relative Fat Mass (RFM) formula is a high-accuracy, simple equation to estimate body fat percentage using only height and waist circumference.

Mathematical Formula

64 - (20 * Height / Waist) [+12 if Female]
Primary Use
Health Screening
Standard
WHO Guidelines
Complexity
Clinical Grade

Frequently Asked Questions

Metric Recommendations

BMI Calculator

Standard body mass index calculation with clinical classification.

Waist-to-Height Ratio

A simple indicator of abdominal obesity.

Body Fat Calculator

Estimate body fat percentage via US Navy method.

Lean Body Mass (LBM)

Calculate the mass of your body excluding fat.

Waist-to-Hip Ratio

Evaluate body fat distribution.

Ideal Weight Calculator

Calculate recommended healthy weight.

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