Relative Fat Mass Calculator

Height-Waist Fat Estimate

Relative Fat Mass, or RFM, estimates body fat percentage using height, waist circumference, and sex.

Method: The calculator divides height by waist and applies the sex-specific RFM equation.

Understanding Relative Fat Mass

1. What This Calculator Measures

Relative Fat Mass estimates body fat percentage from height, waist, and sex.

2. How the Calculation Works

The calculator divides height by waist and applies the sex-specific RFM equation.

3. Formula or Rule Used

RFM = 64 - 20 x height / waist for male; 76 - 20 x height / waist for female.

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