1. What is BMI?

Body Mass Index (BMI) is a simple calculation using a person's height and weight. The formula is BMI = kg/m² where kg is a person's weight in kilograms and m² is their height in meters squared. BMI provides a reliable indicator of body fatness for most people and is used to screen for weight categories that may lead to health problems.

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)

Explanation: The result is then compared to standard weight categories adjusted for age and sex.

3. Importance of BMI Calculation

Details: BMI is a simple, inexpensive screening method for weight category—underweight, healthy weight, overweight, and obesity. It can indicate potential health risks associated with different weight categories.

4. Using the Calculator

Tips: Enter weight in kilograms, height in meters, and select age group. For accurate results, measure height without shoes and weight with minimal clothing.

5. Frequently Asked Questions (FAQ)

Q1: Is BMI accurate for everyone?
A: BMI may overestimate body fat in athletes and those with muscular builds. It may underestimate body fat in older persons and those who have lost muscle.

Q2: What is a healthy BMI range?
A: For adults, 18.5 to 24.9 is considered healthy. For children and teens, BMI is age- and sex-specific.

Q3: How often should I check my BMI?
A: Periodic checks (every 6-12 months) are sufficient unless you're actively trying to change your weight.

Q4: Does BMI differ by age and sex?
A: Yes, children and teens have different BMI categories. Women tend to have more body fat than men at the same BMI.

Q5: What are the limitations of BMI?
A: BMI doesn't distinguish between muscle and fat, doesn't account for fat distribution, and may not be accurate for certain ethnic groups.