BMI calculator

Category: Healthy living


Use the NHS body mass index calculator to measure and track your weight. Find out if you're underweight, a healthy weight or overweight and get relevant advice. If you need to lose weight, you can set weight loss goals and get information on losing weight.


Who is it suitable for?

The NHS BMI calculator is suitable for adults and children over two years old.

How does it work?

Use the app to quickly find out the BMI for anyone over the age of two and share the result by text or email. 

If you need to lose weight, use the tracker to set a 10% weight loss goal and stay motivated to reach your goal.

Use the tracker feature to view your weight changes over time and set a reminder to update the app with your latest weight. 

The app is full of weight management information and advice, inspirational stories, videos and podcasts. 

How do I access it?

The app is available on or free to download from the App Store.