Relative Fat Mass (RFM) Calculator

Formula

The formulas to calculate the Relative Fat Mass (RFM) are:

For males:

\[ RFM_M = 64 - 20 \left(\frac{H}{W}\right) \]

For females:

\[ RFM_F = 76 - 20 \left(\frac{H}{W}\right) \]

Where:

\( RFM_M \) is the relative fat mass for males.
\( RFM_F \) is the relative fat mass for females.
\( H \) is the height (in).
\( W \) is the waist circumference (in).

What is Relative Fat Mass (RFM)?

RFM, or Relative Fat Mass, is a metric used to assess body composition. It calculates the amount of fat present in relation to an individual’s height and waist circumference, providing a more accurate measurement of fatness than traditional methods like BMI (Body Mass Index). RFM considers the distribution of fat in the body, making it a more reliable indicator of overall health and the risk of obesity-related diseases.

Example Calculation

Consider an example where:

Height (H): 70 in
Waist Circumference (W): 35 in
Gender: Male

Using the formula to calculate the Relative Fat Mass for a male:

\[ RFM_M = 64 - 20 \left(\frac{70}{35}\right) = 64 - 40 = 24 \]

This means that the relative fat mass for this example is 24.