1. What is BMI?

BMI (Body Mass Index) 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 helps identify weight categories that may lead to health problems. While not a direct measure of body fat, it correlates with more direct measures of body fat.

4. Using the Calculator

Tips: Enter your weight in kilograms and height in meters. For most accurate results, measure weight in the morning before eating and after using the toilet.

5. Frequently Asked Questions (FAQ)

Q1: What are the NHS BMI categories for adults?
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 (muscle weighs more than fat), pregnant women, or the elderly.

Q3: What should I do if my BMI is high?
A: Consult your GP who may suggest diet changes, exercise, or other interventions depending on your BMI and other health factors.

Q4: 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.

Q5: Does this calculator work for children?
A: No, children's BMI is calculated differently and interpreted using age and sex-specific percentile charts.