Calculate Body Fat With Weight And Height

Body Fat Percentage Formula:

\[ \text{Body Fat %} = (1.20 \times \text{BMI}) + (0.23 \times \text{Age}) - (10.8 \times \text{Sex}) - 5.4 \]

Weight:

Height:

Age:

years

Gender:

Body Fat Percentage:

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1. What is Body Fat Percentage?

Body fat percentage is the total mass of fat divided by total body mass, multiplied by 100. It provides a more accurate assessment of body composition than weight or BMI alone, as it distinguishes between fat mass and lean body mass.

2. How Does the Calculator Work?

The calculator uses the following formula:

\[ \text{Body Fat %} = (1.20 \times \text{BMI}) + (0.23 \times \text{Age}) - (10.8 \times \text{Sex}) - 5.4 \]

Where:

\( \text{BMI} \) — Body Mass Index (weight in kg / height in m²)
\( \text{Age} \) — Age in years
\( \text{Sex} \) — 1 for male, 0 for female

Explanation: This formula estimates body fat percentage based on BMI, age, and gender, providing a quick assessment of body composition.

3. Importance of Body Fat Measurement

Details: Monitoring body fat percentage is important for assessing health risks, tracking fitness progress, and maintaining optimal body composition. High body fat levels are associated with increased risk of various health conditions.

4. Using the Calculator

Tips: Enter weight in kilograms, height in centimeters, age in years, and select gender. All values must be valid (weight > 0, height > 0, age between 1-120).

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this calculation method?
A: This formula provides a reasonable estimate but may not be as accurate as professional methods like DEXA scans or hydrostatic weighing.

Q2: What are healthy body fat percentage ranges?
A: For men: 6-24% (athletes: 6-13%, fitness: 14-17%, average: 18-24%). For women: 16-30% (athletes: 16-20%, fitness: 21-24%, average: 25-30%).

Q3: Why does the formula include age?
A: Body fat percentage tends to increase with age due to changes in metabolism and hormone levels, so age is an important factor in the calculation.

Q4: Can this calculator be used for children?
A: This formula is designed for adults. Different methods and standards should be used for children and adolescents.

Q5: How often should I measure my body fat percentage?
A: For most people, measuring every 4-8 weeks is sufficient to track changes without becoming obsessive about daily fluctuations.