ToolsCalculators
Relative Fat Mass (RFM)
Estimates whole-body fat percentage from height and waist circumference.
Relative Fat Mass (RFM)
Sex
Height
cm
Waist circumference
cm
Complete the fields above to see the result.
When to use
- Estimating body-fat percentage without bioimpedance or DXA, using a tape measure.
Formula
RFM = 64 - 20 x (height / waist circumference) + 12 x sex, with sex = 1 for female, 0 for male (height and waist in the same units).
Pearls and pitfalls
- Height and waist must use the same unit so the ratio is dimensionless.