Body Mass Index (BMI) Calculator BMI calculator

The BMI calculator is used to indicate whether an individual’s weight is within a healthy range for their height.

It calculates BMI and classifies the result into one of four body weight categories: underweight, healthy weight, overweight, or obese.

Please note that the BMI calculator is not a diagnostic tool. If you are concerned about your weight, contact your pharmacist or GP.

This BMI calculator is not suitable for:

You will need to enter your:

Your BMI result will fall into one of four categories:

If your BMI is in the overweight or obese range, you may have a higher risk of developing long-term conditions. These can include type 2 diabetes, heart disease, certain cancers and stroke.

Please note that BMI is only one estimate of an individual’s health, and should be supplemented with other metrics such as waist size or the ability to exercise for extended periods.

You may also want to measure your waist alongside checking your BMI. Carrying too much weight around your stomach can increase the risk of health problems. If you are unsure about how to measure body fat or waist size, speak to your pharmacist or GP.

To get accurate and consistent body weight measurements, regularly weigh yourself at the same time of day, ideally in the morning after using the toilet and before eating or drinking. It is also recommended to wear minimal clothing if possible and remove shoes before stepping onto the scales to prevent inaccuracies in the readings.

Always place the scales on a hard, flat surface, as using the scales on soft or uneven flooring can give inaccurate readings.

If you do not currently have access to weighing scales, you can purchase them from Pharmica. The weighing scales we offer feature high-precision sensors to provide accurate and reliable body weight measurements.

To accurately measure your height, stand straight against a wall with your shoes off. Try to ensure that your heels, back and head are touching the surface of the wall if possible.

Look straight ahead and use a flat object like a book to rest on the top of your head. Take a pencil and mark a spot on the wall under the book. Then, measure the distance from the floor to the mark with a tape measure.

Adopting a balanced, calorie-controlled diet and doing regular physical activity can help maintain a calorie deficit, which is where your body uses more calories than it gets through food. Maintaining a calorific deficit forces the body to use stored fat for energy, leading to weight loss. To find out more about the dietary and lifestyle tips to aid weight loss, read our comprehensive guide to achieving weight loss goals from our experts. 

Alternatively, individuals who are looking to lose weight could consider using clinically proven weight loss treatments. At Pharmica, we offer injectable weight loss treatments such as Mounjaro and Wegovy, which are proven to help achieve up to a 22.5% reduction in body weight when used alongside a calorie-restricted diet and regular exercise. 

Pharmica is officially verified by Trustpilot as the UK’s #1 Weight Loss Service, trusted by over 1.7 million customers for outstanding patient care and a seamless online pharmacy experience. Whether you are considering starting your weight loss journey or continuing it, have full confidence in our expert team and clinically proven treatments to support safe, effective and sustainable weight loss.

Injectable treatments such as Mounjaro and Wegovy are the most effective options currently available, and have been proven to help individuals lose up to 22.5% of their body weight when combined with a calorie-controlled diet and regular exercise.

Alternatively, we also offer weight loss capsules such as Orlistat and Orlos, which are clinically proven to help lose up to 10% of body weight when combined with a healthy diet and regular exercise.

To browse our full range of weight loss treatments, click below.