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Body fat calculator with measurements12/24/2023 ![]() ![]() RFM also had fewer false negative cases of body fat-defined obesity among women and men. In the validation dataset, the RFM performance was compared to BMI and shown to be a better predictor of whole-body fat percentage, measured by dual energy X-ray absorptiometry (DXA), among women and men. The RFM formula was derived following analysis on some 365 anthropometric indices. The relative fat mass equation was derived based on data from the National Health and Nutrition Examination Survey (NHANES) 1999–2004 (n=12,581) and validated with data from the NHANES 2005–2006 data (n = 3,456). Using the Jackson and Pollock equation outlined above. The sum of her seven skinfold measurements is 120 mm. The relative fat mass result can also be interpreted in line with the cut-offs established by the American Council on Exercise: Classification Once you have determined your body density, you can calculate your percent body fat as follows: Body Fat (4.95 / BD 4.50) × 100 Siri Equation Let's look at an example. Woolcott and Bergman (2020) propose RFM cut-offs of 40% for females and 30% for males to diagnose obesity and higher mortality risk. You can use either the Metric or the English system, whichever is more convenient, but ensure that both measurements are input in the same unit system. ![]() RFM for adult females = 76 – 20 x (Height / Waist circumference)įor the best results, when using a tape measure and recording the height and waist circumference, the tape measure should be placed at the top of the hip bone and wrapped around the body.RFM for adult males = 64 – 20 x (Height / Waist circumference).The relative fat mass equation is gender specific: RFM has been generally validated and a recent 2020 study by the original authors has also established gender specific cut-off points for obesity. This fat mass index is considered a simple anthropometric procedure, easier to estimate than other body fat percentage methods and more accurate than the body mass index (BMI). The relative fat mass (RFM) index estimates body fat percentage based on the ratio of height and waist measurements.
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