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. It provides a reliable indicator of body fatness for most people.

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: BMI is calculated by dividing weight in kilograms by the square of height in meters.

3. Importance of BMI Calculation

Details: BMI provides a simple numeric measure of a person's thickness or thinness, allowing health professionals to discuss weight problems more objectively with their patients.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

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

Q2: Are there limitations to BMI?
A: BMI doesn't account for muscle mass, bone density, or fat distribution. Athletes may have high BMI without excess fat.

Q3: Can BMI be used for children?
A: Children's BMI is interpreted differently using age and sex-specific percentiles rather than fixed ranges.

Q4: How accurate is BMI?
A: BMI correlates well with body fat for most people but may misclassify muscular individuals or those with very different body compositions.

Q5: What are alternatives to BMI?
A: Waist circumference, skinfold thickness measurements, or more advanced techniques like DEXA scans may provide more accurate body composition analysis.