RFM Reference Table
| Category | Males | Females | Health Implications |
|---|---|---|---|
| Underfat | < 8% | < 14% | May have negative health effects |
| Athletic | 8-14% | 14-21% | Optimal for athletes |
| Fitness | 15-19% | 21-25% | Excellent general health |
| Average | 20-24% | 25-32% | General population average |
| Overfat | 25-29% | 32-38% | Increased health risks |
| Obese | > 30% | > 38% | High risk of health issues |
What is RFM?
Relative Fat Mass (RFM) is a newer method to estimate body fat percentage using only height and waist circumference. Studies show it's more accurate than BMI for determining body composition.
How to Measure
Measure your waist at the level of your navel while standing relaxed. For height, measure without shoes. Both measurements should be in centimeters for accurate results.
Benefits of RFM
Unlike BMI, RFM better accounts for body composition and fat distribution. It's simple to calculate, requires no special equipment, and provides more accurate health risk assessment.
The RFM Calculator, or Relative Fat Mass Calculator, is a quick and simple tool to estimate your body fat percentage. Unlike other methods, it only needs your height and waist size. This makes it perfect for everyday use without expensive equipment or complex math.
What is RFM?
RFM stands for Relative Fat Mass. It’s a modern method to estimate body fat percentage. It was developed as a more accurate alternative to BMI (Body Mass Index), especially when it comes to showing how much fat your body really has.
How Does It Work?
The RFM formula uses two things: your height and waist size. It also takes gender into account, because men and women store fat differently.
For Men: RFM = 64 - (20 × height / waist)
For Women: RFM = 76 - (20 × height / waist)
Make sure to use the same unit (either inches or cm) for both height and waist to get accurate results.
Why Use an RFM Calculator?
The main benefit is how easy it is. You don’t need to weigh yourself or use special tools. It’s more accurate than BMI when it comes to fat levels and is helpful for tracking fitness progress or health risks.
Example
Let’s say a woman is 165 cm tall and has a waist size of 70 cm:
RFM = 76 - (20 × 165 ÷ 70) = 76 - 47.14 = 28.86%
This means her body fat percentage is around 28.9%.
Healthy Body Fat Ranges
Men: 10% to 20% is generally considered healthy
Women: 18% to 28% is considered healthy
Higher values may increase the risk of health issues like diabetes or heart disease.
Track Your Health Without Spending $
The RFM Calculator is a free and simple tool to understand your body better. It gives fast results, doesn’t require weighing scales, and can be used by anyone. Just take a few measurements, enter them into the calculator, and know where you stand.
Start using the RFM Calculator today to track your body fat and stay ahead in your health journey.