Body Fat Percentage Calculator (UK)

Body Fat Formula (Men):

\[ \text{Body Fat %} = (1.20 \times \text{BMI}) + (0.23 \times \text{Age}) - 16.2 \]

Body Fat Percentage:

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1. What is a Body Fat Percentage Calculator?

Definition: This calculator estimates body fat percentage based on BMI, age, and gender using established formulas.

Purpose: It helps individuals assess their body composition and health risks associated with body fat levels.

2. How Does the Calculator Work?

The calculator uses different formulas for men and women:

Men: \[ \text{Body Fat %} = (1.20 \times \text{BMI}) + (0.23 \times \text{Age}) - 16.2 \]

Women: \[ \text{Body Fat %} = (1.20 \times \text{BMI}) + (0.23 \times \text{Age}) - 5.4 \]

Where:

BMI — Body Mass Index (unitless)
Age — In years

Explanation: These formulas estimate body fat percentage based on statistical relationships between BMI, age, and body fat.

3. Importance of Body Fat Percentage

Details: Body fat percentage is a better health indicator than BMI alone, as it distinguishes between fat and muscle mass.

4. Using the Calculator

Tips: Enter your BMI (calculate separately if unknown), age (18+), and gender. All values must be valid.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this calculator?
A: It provides a reasonable estimate but may not be as accurate as professional methods like DEXA scans.

Q2: What's a healthy body fat percentage?
A: For men: 8-19% (athletes), 20-25% (acceptable); For women: 21-33% (varies by age).

Q3: Why different formulas for men and women?
A: Women naturally carry more essential body fat than men.

Q4: Can I use this if I'm under 18?
A: No, these formulas are validated for adults only.

Q5: Where can I get my BMI?
A: Use our BMI Calculator tool or calculate as weight(kg)/(height(m))².