1. What is BMI?

Body Mass Index (BMI) is a measure that uses your height and weight to determine if your weight is healthy. The NHS uses BMI as a screening tool to identify potential weight problems in adults.

2. How Does the Calculator Work?

The calculator uses the standard BMI formula:

Where:

• \( weight \) — Body weight in kilograms
• \( height \) — Height in meters

Explanation: BMI provides a simple numeric measure of a person's thickness or thinness, allowing health professionals to discuss weight problems objectively.

3. Importance of BMI Calculation

Details: BMI is a quick and easy way to screen for weight categories that may lead to health problems. It helps identify potential weight issues in adults where more direct measures of body fat may be unavailable.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

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

Q2: Is BMI accurate for everyone?
A: BMI may not be accurate for athletes (high muscle mass), pregnant women, or the elderly (muscle loss).

Q3: Should children use this calculator?
A: No, children need BMI-for-age percentiles specific to their age and sex.

Q4: What's a healthy BMI range?
A: For most adults, 18.5 to 24.9 is considered healthy.

Q5: Where can I get more advice?
A: Consult your GP if your BMI is outside the healthy range or if you have concerns about your weight.