1. What is BMI, BMR and Body Fat Percentage?

BMI (Body Mass Index) is a measure of body fat based on height and weight. BMR (Basal Metabolic Rate) is the number of calories your body needs to perform basic life-sustaining functions. Body Fat Percentage is the proportion of fat to total body weight.

2. How Does the Calculator Work?

The calculator uses the following formulas:

Where:

• \( weight \) — Body weight in kilograms
• \( height \) — Height in meters (converted from cm input)
• \( age \) — Age in years
• \( sex \) — 1 for male, 0 for female

3. Importance of These Measurements

Details: These measurements help assess overall health, determine appropriate calorie intake for weight management, and evaluate body composition for fitness goals.

4. Using the Calculator

Tips: Enter weight in kg, height in cm, age in years, and select gender. All values must be valid positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is a healthy BMI range?
A: For adults, 18.5-24.9 is considered normal weight. Below 18.5 is underweight, 25-29.9 is overweight, and 30+ is obese.

Q2: How accurate are these calculations?
A: These are estimates. BMR can vary based on muscle mass, and body fat formulas have margin of error. Professional testing is more accurate.

Q3: Why are there different BMR formulas for males and females?
A: Men typically have more muscle mass and higher metabolic rates, so the formulas account for these physiological differences.

Q4: What's a healthy body fat percentage?
A: For men: 8-19% is healthy, for women: 21-33% is healthy. Athletes typically have lower percentages.

Q5: How often should I measure these values?
A: For general tracking, monthly measurements are sufficient. Daily fluctuations are normal due to hydration and other factors.