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: The formula divides your weight by the square of your height to determine your body mass index.

3. Importance of BMI Calculation

Details: BMI is a simple, inexpensive screening method for weight categories that may lead to health problems. It's used to screen for weight categories that may lead to health problems.

4. Using the Calculator

Tips: Enter weight in kilograms and height in meters. All values must be valid (weight > 0, height > 0). The calculator will provide both your BMI number and weight category.

5. Frequently Asked Questions (FAQ)

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

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

Q3: How often should I check my BMI?
A: For most adults, checking BMI once or twice a year is sufficient unless you're actively trying to lose or gain weight.

Q4: Are there limitations to BMI?
A: BMI doesn't distinguish between fat and muscle, doesn't account for fat distribution, and may not be accurate for certain ethnic groups, pregnant women, or children.

Q5: Should children use the same BMI categories?
A: No, children's BMI is age and sex-specific and should be compared against growth charts rather than adult categories.