1. What is BMI?

Definition: Body Mass Index (BMI) is a measure that uses your height and weight to determine if you're a healthy weight.

Purpose: The NHS uses BMI as a screening tool to identify potential weight problems in adults.

2. How Does the BMI Calculator Work?

The calculator uses the formula:

Where:

• Weight — Your body weight in kilograms
• Height — Your height in meters

3. BMI Categories

• Underweight: BMI below 18.5
• Healthy weight: BMI 18.5 to 24.9
• Overweight: BMI 25 to 29.9
• Obese: BMI 30 or above

4. Using the Calculator

Tips: Enter your weight in kilograms and height in meters. For accuracy, measure without shoes and heavy clothing.

5. Frequently Asked Questions (FAQ)

Q1: Is BMI accurate for everyone?
A: BMI is a useful screening tool but doesn't account for muscle mass. Athletes may have high BMI without excess fat.

Q2: What if I know my height in feet/inches?
A: Convert to meters (1 foot = 0.3048m, 1 inch = 0.0254m) before entering.

Q3: What's a healthy BMI range?
A: NHS recommends 18.5-24.9 for most adults.

Q4: Should children use this calculator?
A: No, children need age and sex-specific BMI charts.

Q5: Where can I get more advice?
A: Visit NHS BMI Calculator for official guidance.