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 — Measured in kilograms (kg)
• Height — Measured in meters (m)

Explanation: BMI compares your weight to your height to estimate body fatness and health risks.

3. Importance of BMI Calculation

Details: BMI helps identify weight categories that may lead to health problems. It's used to screen for weight categories that might indicate increased risk of health issues like heart disease, diabetes, and certain cancers.

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 (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 the elderly. It's a screening tool, not a diagnostic measurement.

Q3: How often should I check my BMI?
A: For most adults, checking every 6-12 months is sufficient unless you're actively trying to change your weight.

Q4: What should I do if my BMI is high?
A: Consult your GP. They may suggest dietary changes, increased physical activity, or other lifestyle modifications.

Q5: Can children use this calculator?
A: No, children need age- and sex-specific BMI calculations. This calculator is for adults only.