BMI Calculator
Calculate Your BMI Online
BMI Calculator
BMI (Body Mass Index) is a simple measure of how healthy your weight is relative to your height.
Simply enter your details into the calculator and we will calculate your BMI instantly.
BMI Weight Categories
Underweight = Less Than 18.5
Normal weight = 18.5–25
Overweight = 25–30
Obesity = BMI of
30 or greater
What is BMI?
BMI (Body Mass Index) is a simple measure of how healthy your weight is relative to your height. It can be
easily calculated if you know your height and your weight. Try and input your measurements above to quickly
calculate your BMI. Your BMI can be a useful measure of obesity and can help you work out how much weight you
may want to lose.
It is important to remember that BMI is a quick approximation of what category
of weight you fall into. It doesn't take into account lots of other factors that can affect your weight such as
bone density, water weight. It may over-estimate body fat in athletes due to their muscular build and it may
underestimate body fat in older persons who have lost muscle.
Why should I be concerned with a high BMI?
The higher your BMI, the more likely it is the that you will be at risk of certain diseases including diabetes, gallstones, high blood pressure, heart disease and even some forms of cancer. For people with a BMI over 28 it is recommended that you try and lose weight to help reduce your chances of developing diseases which can be associated with obesity.
How can I lose weight if my BMI says I'm overweight?
If you have a BMI over 28, you may be eligible for using orlistat weight loss medication. Orlistat is clinically proven to help lose 50% more weight than dieting alone. For more information visit our weight loss clinic.
