Relative Fat Mass (RFM) Calculator

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Estimate your body fat percentage instantly using only height and waist measurements.

Gender

Height (cm)

Waist (cm)

About the Relative Fat Mass (RFM) Metric

The **Relative Fat Mass (RFM)** formula was validated by researchers at Cedars-Sinai Medical Center as a highly reliable and simplified body fat estimator. Because it eliminates weight and neck circumference variables, it is less prone to mathematical errors than other equations.

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BMI does not distinguish muscle mass from fat mass. RFM directly utilizes the height-to-waist ratio to assess overall adiposity.

Take the measurement at the top of the hip bone (iliac crest) after exhaling naturally.