1. What is BMI?

Body Mass Index (BMI) is a value derived from the mass and height of a person. It provides a simple numeric measure of a person's thickness or thinness, allowing health professionals to discuss weight problems more objectively with their patients.

2. How Does the Calculator Work?

The calculator uses the standard BMI formula:

Where:

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

Smart Adjustment: The calculator can adjust BMI interpretation based on age and gender for more personalized results.

3. Importance of BMI Calculation

Details: BMI is a simple, inexpensive screening method for weight category—underweight, healthy weight, overweight, and obesity. It correlates fairly well with body fat in most people.

4. Using the Calculator

Tips: Enter weight in kilograms, height in meters, age in years, and select gender. All values must be valid (weight > 0, height > 0, age between 1-120).

5. Frequently Asked Questions (FAQ)

Q1: What are the standard BMI categories?
A: Underweight (<18.5), Normal weight (18.5-24.9), Overweight (25-29.9), Obesity (≥30).

Q2: Does BMI apply to everyone?
A: BMI may overestimate body fat in athletes and those with muscular builds, and underestimate it in older persons who have lost muscle mass.

Q3: How does age affect BMI interpretation?
A: Older adults may have a slightly higher BMI range considered healthy compared to younger adults.

Q4: Are there gender differences in BMI?
A: Women tend to have more body fat than men at the same BMI, which is accounted for in smart BMI calculations.

Q5: What are the limitations of BMI?
A: BMI doesn't measure body fat directly, doesn't account for muscle mass, bone density, or fat distribution.