1. What is RFM (Relative Fat Mass)?

Definition: RFM is a simple method to estimate body fat percentage using just height and waist circumference measurements.

Purpose: It provides a quick alternative to BMI that better accounts for body composition differences.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( RFM \) — Relative fat mass percentage (%)
• \( H \) — Height (cm)
• \( W \) — Waist circumference (cm)

Explanation: The ratio of height to waist circumference is calculated and used in a simple linear equation to estimate body fat percentage.

3. Importance of RFM Calculation

Details: RFM provides a more accurate estimate of body fat than BMI for many individuals, helping assess health risks associated with obesity.

4. Using the Calculator

Tips: Measure height and waist circumference accurately. Waist should be measured at the narrowest point between ribs and hips.

5. Frequently Asked Questions (FAQ)

Q1: How does RFM compare to BMI?
A: RFM considers waist size, making it better at distinguishing between fat and muscle mass than BMI.

Q2: What's a healthy RFM range?
A: For men: 2-24% (healthy), women: 10-30% (healthy). Values above may indicate excess fat.

Q3: When is RFM most useful?
A: For individuals with high muscle mass where BMI might be misleading, or for quick screenings.

Q4: How accurate is RFM?
A: Studies show RFM is comparable to more complex methods like DXA scans for most people.

Q5: Can children use this calculator?
A: RFM is validated for adults; pediatric body fat assessment requires different methods.