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 numeric value that helps categorize weight status.

2. How Does the Calculator Work?

The calculator uses the 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 is a simple screening tool for weight categories that may lead to health problems. For weight gain purposes, tracking BMI helps monitor progress toward healthy weight goals.

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 height without shoes and weight with minimal clothing.

5. Frequently Asked Questions (FAQ)

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

Q2: Can BMI be used for everyone?
A: BMI may not be accurate for athletes (high muscle mass), pregnant women, children, and the elderly. Other measurements may be needed.

Q3: How often should I check my BMI when trying to gain weight?
A: For weight gain tracking, checking BMI every 2-4 weeks is reasonable to monitor progress.

Q4: What's the best way to gain weight healthily?
A: Focus on nutrient-dense foods, strength training, and gradual weight gain (0.5-1 kg per week).

Q5: Does BMI measure body fat?
A: BMI doesn't directly measure body fat but correlates with body fat for most people. Other measurements may be needed for precise body composition.