BMI calculator: Try our easy-to-use BMI chart

BMI, or Body Mass Index, is a measure health experts use to determine if a person is a healthy weight for their height.

The body mass index takes your height and weight into consideration to measure your body fat and determine if you are either ‘underweight’, ‘healthy’, ‘overweight’, ‘obese’ or ‘extremely obese’. Many people use the body mass index calculation to determine if they are the right weight for their height, or if they need to lose weight before embarking on a diet.

Does the BMI calculator work for everyone?

The BMI calculation won’t work for pregnant women, women who are breastfeeding, or for kids. It also won’t be accurate for athletes, people who weight-train, if you’re over 60 or if you have a long-term health condition too, so it’s important to take these factors into consideration when calculating your BMI.

What does my BMI result mean?

You can use our BMI chart to see if you have a healthy body mass index. Once you’ve worked it out you’ll end up with a number, and that will tell you which category of weight you fall into.

BMI results:

Under 18.5: Underweight
18.5-25: Healthy weight
25-30: Overweight
30-40: Obese
Over 40: Extremely obese

How can I work out my BMI?

To work out your BMI, all you need to do is find your weight along the top and your height along the left-hand side of the chart, and then check to see what number the two lines meet in the middle at. This is your body mass index. If you’re not sure what you weigh in kilos and pounds, you can use our handy kilos to stones converter.

Download your FREE BMI chart now!

What shall I do if my result is anything other than ‘healthy weight’?

Whether your results come back showing you are underweight or overweight, it’s important to remember that this is a guide. The BMI calculations can’t tell the difference between fat, muscle and bone, so if you’re worried it’s important to speak to your doctor. Being underweight or overweight can lead to many health problems, so speak to a health professional if you have any concerns.