1. What is BMI?

BMI (Body Mass Index) 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 standard BMI formula:

Where:

• \( weight \) — Weight in pounds (lb)
• \( height \) — Height in inches (in)
• 703 — Conversion factor

Explanation: The formula calculates body mass index by dividing weight by the square of height, with a conversion factor to adjust units.

3. Importance of BMI Calculation

Details: BMI is widely used as a screening tool to identify possible weight problems in adults. It helps assess risk for weight-related health problems.

4. Using the Calculator

Tips: Enter weight in pounds and height in inches. All values must be valid (weight > 0, height > 0). The calculator will provide both the BMI value and category.

5. Frequently Asked Questions (FAQ)

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

Q2: Is BMI accurate for everyone?
A: BMI may overestimate body fat in athletes and underestimate it in older people who have lost muscle mass.

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

Q4: Can BMI be used for children?
A: Children's BMI is calculated differently, using percentiles based on age and sex rather than fixed categories.

Q5: What's a healthy BMI range?
A: For most adults, a BMI between 18.5 and 24.9 is considered healthy.