Relative Fat Mass Calculator (RFM)

RFM stands for Relative Fat mass.
It predicts the percentage of fat using waist and hip dimensions

There are many scientific studies and research that have been conducted across different age groups to determine which is more accurate.
Most agree that RFM predicts the body fat (BF) more accurately than BMI.

It uses the height and waist circumference as the base measures and then the following equation is used.
The equation changes based on gender.
Male: 64 – (20 x height/waist circumference).
Female: 76 – (20 x height/waist circumference).
Unified formula.
RFM = 64 − (20 × (Height ÷ Waist) ) + (12 × Gender).
Gender = 0 for male and 1 for female.
Height in meters and Waist circumference in meters.
We can use feet/inches or cms but height and waist should use same unit.

By measuring body fat with your height and waist, it can forewarn on potential health risks.
This is also a useful tracker for those trying to shed weight or gain weight and lets them know if they are on track and when to stop.

By using height and waist dimensions that are easily measurable, we can monitor our body fat % from time to time.
This will alert us whenever we are in threshold of over weight/ obese category.
Corrective measures can be taken immediately.
A high fat mass percentage RFM can lead to diabetes and heart / cardio vascular diseases and other medical conditions.

If RFM % is greater than 35% in Women and 25% in Men, then they are considered as Obese.

For men, in the range 6-25%.
For women, in the range 15-30%

It indicates less fat / adipose tissue in the body.
Fat is potential energy stored by the body.
It also keeps the body warm. Low fat can also lead to issues such as low energy, skin , eye problems, cell growth inhibition and so on...
Low RFM is < 5% in men and < 10% in women.

It is mostly used for adults age group > 20.
It has not been proven yet for those below 20 (children and adolescents).