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BMI calculator

Nurse weighing patient

What is BMI?

BMI, or body mass index, is a simple calculation that is commonly used to indicate whether you’re a healthy weight for your height.

Your BMI is calculated by dividing your weight in kilograms by your height in metres squared.

Is it for you?

If you want to know whether you're a healthy weight for your height, try our BMI calculator below. It's recommended for adults only. Special charts are used to calculate children’s recommended weight-for-height that takes into account other factors such as physical growth.

Try it out

Enter your details below and our calculator will work out your BMI from your height in either metres or feet and inches, and your weight in either kilograms or stones and pounds.

Once you know your BMI, our health information can advise you what your next steps should be.

Enter your height in

Enter your weight in

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