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 screening tool to identify potential weight problems in adults.

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 helps identify potential weight problems but doesn't diagnose body fatness or health. It's used alongside other measurements for a complete health assessment.

4. Using the Calculator

Tips: Enter your weight in kilograms and height in meters. For accurate results, 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 may not be accurate for athletes (high muscle mass), pregnant women, or older people who may have lost muscle mass.

Q3: How often should I check my BMI?
A: For most adults, checking every few months is sufficient unless you're actively trying to lose or gain weight.

Q4: What should I do if my BMI is outside the healthy range?
A: Consult your GP for advice. They may suggest dietary changes, exercise, or other interventions.

Q5: Does BMI apply to children?
A: Children's BMI is calculated differently, using percentiles based on age and sex-specific growth charts.