1. What is BMI?

BMI (Body Mass Index) is a measure that uses your height and weight to work out if your weight is healthy. The NHS uses BMI as a simple way to assess whether someone might be underweight, healthy weight, overweight, or obese.

2. How Does the Calculator Work?

The calculator uses the standard BMI formula:

Where:

• \( weight \) — Your weight in kilograms (kg)
• \( height \) — Your height in meters (m)

Explanation: BMI compares your weight to your height to give an indication of whether you're a healthy weight for your height.

3. Importance of BMI Calculation

Details: BMI is a useful screening tool to identify potential weight problems in adults. It helps healthcare professionals assess health risks associated with being underweight or overweight.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

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

Q2: Is BMI accurate for everyone?
A: BMI has limitations - it may overestimate body fat in muscular people and underestimate it in older people with less muscle mass.

Q3: Should children use this calculator?
A: No, children need age and sex-specific BMI charts as their body composition changes with growth.

Q4: What's a healthy BMI for older adults?
A: For those over 65, a BMI between 23-29.9 may be healthier than the standard range.

Q5: Where can I get more advice about my BMI?
A: Consult your GP or visit the NHS website for personalized advice based on your BMI result.