RFM Calculator - Relative Fat Mass

Your details

Biological sex, which determines the RFM equation constant (64 for male, 76 for female).
Your standing height without shoes.
cm
Measure horizontally at the midpoint between the top of the hip bone and the bottom of the lowest rib, after a normal exhale.
cm
Relative Fat MassAverage
22.8%

Estimated whole-body fat percentage from height and waist

Body fat categoryAverage
Height-to-waist ratio2.059
22.8 %
Essential<6Athletes6-14Fitness14-18Average18-25Obese25+

Your RFM is 22.8% - Average category.

  • Your body fat is within the average range but above the fitness threshold.
  • RFM was validated against DXA (dual-energy X-ray absorptiometry) scans across thousands of adults and is more accurate than BMI at estimating true fat percentage.
  • RFM only uses waist and height, so it cannot distinguish where fat is stored. Paired with waist-to-height ratio it gives a fuller picture of cardiometabolic risk.

Next stepIncreasing lean muscle through resistance training and moderating caloric intake can move you into the fitness range.

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