1. What is Body Fat Percentage?

Definition: Body fat percentage is the proportion of fat mass to total body mass, expressed as a percentage.

Purpose: It's a key health indicator that helps assess fitness levels, track progress, and evaluate health risks.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Fat \) — Fat mass in kilograms
• \( Total \) — Total body mass in kilograms

Explanation: The fat mass is divided by total body mass, then multiplied by 100 to convert to percentage.

3. Importance of Body Fat Percentage

Details: Unlike BMI, body fat percentage distinguishes between fat and lean mass, providing a more accurate health assessment.

4. Using the Calculator

Tips: Enter your fat mass and total body mass in kilograms. Both values must be > 0, and fat mass cannot exceed total mass.

5. Frequently Asked Questions (FAQ)

Q1: How do I measure my fat mass?
A: Use methods like skinfold calipers, bioelectrical impedance scales, DEXA scans, or hydrostatic weighing.

Q2: What's a healthy body fat percentage?
A: For men: 6-24%, women: 16-30% (varies by age and fitness level).

Q3: Why not just use BMI?
A: BMI doesn't distinguish between muscle and fat. Athletes may have high BMI but low body fat.

Q4: How often should I measure body fat?
A: Every 4-8 weeks to track changes, as daily fluctuations are normal.

Q5: Can I use pounds instead of kilograms?
A: Yes, but use the same unit for both measurements (1 kg = 2.2 lbs).