Select your gender, enter your height, and enter your waist circumference into the calculator to determine your relative fat mass.

## RFM Formula

The following equations are used to calculate the relative fat mass.

RFMM = 64 – 20 * (H/W)

RFMF = 76 – 20 * (H/W)

- Where RFMM and RFMF are the relative fat mass for male and females respectively
- H is height (in)
- W is waist circumference (in)

## FAQ

**What is RFM?**

RFM standard for relative fat mass. Relative fat mass if a measure of your body fat percentage using your height and waist circumference. It’s less accurate than other measures of body fat, but a better indication of fitness than BMI.

**What is a good body fat %?**

The healthy range of body fat % for males is 8-12% and 11-15% for females.

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