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 — in kilograms (kg)
• Height — in meters (m)

Explanation: BMI compares your weight to your height to determine if you're underweight, normal weight, overweight, or obese.

3. Importance of BMI Calculation

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

4. Using the Calculator

Tips: Enter your weight in kilograms and height in meters. For accurate results, measure height without shoes and weight with minimal clothing.

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), 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: What is the Australian standard for BMI?
A: Australia uses the same BMI categories as international standards, but waist circumference is also considered.

Q4: How often should I check my BMI?
A: For most adults, checking every 6-12 months is sufficient unless you're actively trying to change your weight.

Q5: What's the ideal BMI range?
A: The healthy weight range is 18.5 to 24.9, but individual factors like muscle mass and frame size should be considered.