Calculate your Body Mass Index (BMI) and get personalized health advice based on NHS guidelines
You should not use this tool if you:
This tool is for informational purposes only and should not be used to diagnose any symptoms. If you are worried about your weight, contact your local pharmacist or GP surgery.
People from Asian, Black African, African-Caribbean and Middle Eastern backgrounds have a higher risk of developing health problems at a lower BMI.
Calculating your BMI...
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Body Mass Index (BMI) is a measure that uses your height and weight to work out if your weight is healthy. The BMI calculation divides an adult's weight in kilograms by their height in metres squared.
Underweight: BMI less than 18.5
Healthy weight: BMI 18.5 to 24.9
Overweight: BMI 25 to 29.9
Obese: BMI 30 or more
BMI is a useful measurement for most people over 18, but it's not perfect. For example, if you have a lot of muscle, you may be classed as overweight or obese despite having low body fat. This is why measuring your waist can give you a better idea of your overall health.
If you're concerned about your weight or BMI result, speak to your GP or practice nurse. They can provide personalized advice and support for managing your weight safely.
Our BMI calculator is a free online tool designed to help you quickly and accurately calculate your Body Mass Index. Based on guidelines from the NHS (National Health Service), this calculator provides personalized health advice based on your BMI result and ethnic background.
Body Mass Index is an important health metric that can help you understand if you're at a healthy weight for your height. A healthy BMI can reduce your risk of developing serious health conditions such as type 2 diabetes, heart disease, and stroke.
Whether you're looking to lose weight, gain weight, or maintain your current weight, understanding your BMI is the first step. Use our calculator regularly to track your progress and stay motivated on your health journey.