BMI & Healthy Weight Calculator

Calculate your Body Mass Index (BMI) and see where you sit on the healthy weight range.

Understanding your BMI can give you a simple snapshot of whether your weight is in a range that is generally considered healthy for your height, age and gender. This calculator uses standard NHS and NICE guidance to estimate your BMI and show which category you fall into, from underweight to obese.

BMI is only one part of the picture, but it can help you start a conversation about your health and highlight when it may be useful to make changes to your lifestyle, such as diet or physical activity.

By using this tool, you can track how your BMI changes over time as you make improvements to your health and wellbeing. Remember that BMI is a guide only and may not be suitable for everyone.

How to use the calculator:

1. Enter your age.
2. Select your sex.
3. Enter your height in centimetres.
4. Enter your weight in kilograms.
5. Click “Calculate BMI” to see your BMI value and where it falls on the chart.
6. Use this information to understand your weight category. If you have any concerns or would like advice or support, please speak to a GP, nurse or other health professional.