1. What is BMI?

Body Mass Index (BMI) is a simple index of weight-for-height that is commonly used to classify underweight, normal weight, overweight and obesity in adults. It is calculated by dividing weight in kilograms by height in meters squared.

2. How Does the Calculator Work?

The calculator uses the standard BMI formula:

Where:

• \( weight \) — Body weight in kilograms (kg)
• \( height \) — Height in meters (m)

Interpretation: The result is compared against standard BMI categories:

• Underweight: BMI < 18.5
• Normal weight: BMI 18.5-24.9
• Overweight: BMI 25-29.9
• Obese: BMI ≥ 30

3. Importance of BMI Calculation

Details: BMI provides a simple numeric measure of body fatness for most people and is used to screen for weight categories that may lead to health problems.

4. Using the Calculator

Tips: Enter weight in kilograms and height in meters. For accuracy, measure height without shoes and weight in light clothing.

5. Frequently Asked Questions (FAQ)

Q1: Is BMI accurate for everyone?
A: BMI may overestimate body fat in athletes and those with muscular build, and underestimate it in older people who have lost muscle mass.

Q2: What are the BMI standards for military personnel?
A: Military organizations often have stricter BMI requirements than general population standards.

Q3: How often should I check my BMI?
A: For most adults, checking BMI annually is sufficient unless actively trying to change weight.

Q4: Are there limitations to BMI?
A: BMI doesn't distinguish between fat and muscle mass, and doesn't account for fat distribution which affects health risks.

Q5: Should children use this calculator?
A: No, children and teens need age- and sex-specific BMI percentile charts rather than adult categories.