RFM Body Fat Calculator
Estimate your body fat percentage using sex, waist and height.
Relative Fat Mass (RFM Method)
Quick Overview
The Relative Fat Mass (RFM) method estimates body fat percentage using only waist and height measurements, adjusted by sex.
Use this calculator to get a quick estimate of your body fat and see how it compares to standard body fat categories.
Looking for more detail? The Body Fat Percentage Guide in the Related Guides section explains body fat ranges, interpretation, and how different body fat methods work and compare.
Use this calculator to get a quick estimate of your body fat and see how it compares to standard body fat categories.
Looking for more detail? The Body Fat Percentage Guide in the Related Guides section explains body fat ranges, interpretation, and how different body fat methods work and compare.
Calculate your body fat percentage
Understanding RFM Body Fat Method
How RFM Works
The Relative Fat Mass (RFM) method estimates body fat percentage using only waist and height measurements, adjusted by sex.
It is a simple, practical method designed for quick body fat estimation without the need for specialized equipment.
It is a simple, practical method designed for quick body fat estimation without the need for specialized equipment.
How to Interpret Your Result
Your RFM result is an estimate of body fat percentage and should be used as a reference rather than a precise measurement.
Focus on long-term trends instead of single readings, since small fluctuations are normal.
The most useful way to apply RFM is tracking changes consistently using the same method under similar conditions.
Focus on long-term trends instead of single readings, since small fluctuations are normal.
The most useful way to apply RFM is tracking changes consistently using the same method under similar conditions.
Frequently Asked Questions
What is the RFM Body Fat formula?
The RFM formula estimates body fat percentage using waist and height measurements, adjusted by sex. It is a simple method that does not require special equipment.
What are the Body Fat categories?
Body fat is grouped into standard ranges such as essential fat, athletes, fitness, average, and obese. These ranges differ slightly for men and women and help interpret results.
Is the RFM formula accurate?
RFM provides a good estimate for most adults but is not a precise measurement. It may be less accurate for very muscular or obese individuals.
What is the difference between RFM and BMI?
BMI uses weight and height, while RFM uses waist and height. RFM better reflects fat distribution, especially around the abdomen.