1. What is BMI?

Body Mass Index (BMI) is a measure of body fat based on height and weight that applies to adult men and women. It provides a simple numeric measure of a person's thickness or thinness.

2. How Does the Calculator Work?

The calculator uses the BMI formula:

Where:

• \( W \) — Weight in kilograms (kg)
• \( H \) — Height in meters (m)

Explanation: The formula calculates body mass index by dividing weight in kilograms by the square of height in meters.

3. Importance of BMI Calculation

Details: BMI is widely used as a screening tool to identify possible weight problems in adults. It helps categorize individuals into underweight, normal weight, overweight, or obese categories, which can indicate potential health risks.

4. Using the Calculator

Tips: Enter weight in kilograms and height in meters. All values must be valid (weight > 0, height > 0). For accurate results, measure weight and height precisely.

5. Frequently Asked Questions (FAQ)

Q1: What are the BMI categories?
A: Underweight: BMI < 18.5; Normal weight: BMI 18.5-24.9; Overweight: BMI 25-29.9; Obese: BMI ≥ 30.

Q2: Is BMI accurate for everyone?
A: BMI may not accurately reflect body fat in athletes (who have more muscle mass), the elderly, or certain ethnic groups. It should be used as a screening tool rather than a diagnostic measure.

Q3: How often should I check my BMI?
A: For most adults, checking BMI every 6-12 months is sufficient unless you're actively trying to change your weight.

Q4: Can children use this calculator?
A: This calculator is designed for adults. Children and teens require age and sex-specific BMI percentiles rather than the standard adult categories.

Q5: What if my BMI indicates I'm overweight or underweight?
A: Consult with a healthcare professional who can provide personalized advice based on your overall health, body composition, and medical history.