1. What is a BMI Calculator?

Definition: This calculator estimates Body Mass Index (BMI) based on weight and height measurements.

Purpose: It helps individuals assess whether their weight is in a healthy range relative to their height.

2. How Does the BMI Calculator Work?

The calculator uses the formula:

Where:

• \( BMI \) — Body Mass Index (kg/m²)
• \( W \) — Weight (kilograms)
• \( H \) — Height (meters)

Explanation: Weight is divided by the square of height to calculate the body mass index.

3. Importance of BMI Calculation

Details: BMI is a simple screening tool that may indicate weight categories that could lead to health problems.

4. Using the Calculator

Tips: Enter your weight in kilograms and height in meters. All values must be > 0.

5. BMI Categories (NHS Standard)

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

6. Frequently Asked Questions (FAQ)

Q1: Is BMI accurate for everyone?
A: BMI may not be accurate for athletes, pregnant women, or those with high muscle mass as it doesn't distinguish between muscle and fat.

Q2: What's a healthy BMI range?
A: For most adults, 18.5 to 24.9 is considered healthy according to NHS guidelines.

Q3: How do I convert my height to meters?
A: Divide your height in centimeters by 100 (e.g., 175cm = 1.75m).

Q4: How do I convert my weight from stones to kg?
A: Multiply stones by 6.35 (e.g., 10 stone = 63.5kg).

Q5: Should children use this calculator?
A: No, children and teens need age and sex-specific BMI calculations.