An important message from Express Chemist

In these unprecedented times due to COVID-19 we are listening to the latest advice from the government and their health specialists. We are continuing to work in these challenging times so that we can serve the needs of our customers.

Please note that we are receiving a particularly high volume of orders, enquiries, telephone calls and emails. We are working exceptionally hard to process orders and respond to customer enquiries as quickly as possible. Unfortunately it is currently taking a little longer to process and dispatch orders than usual, so please allow 2-3 working days for shipment.

Please also note that postal services and couriers are experiencing similar challenges so please allow longer delivery times than usual. We would be grateful if you can be patient and not contact us regarding your order before these times are up so we can reduce the pressure on our customer service team.

Thank you for your patience and understanding.

If you have symptoms of coronavirus stay at home and self-isolate for 10 days.
For information about coronavirus please click here.

Keep well and stay safe.

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Express Chemist Body Mass Index Calculator

The Body Mass Index (BMI) scale is a rough indication of how healthy your body weight is. A "normal" BMI is roughly between 18 and 25. Anything below 18 is generally considered underweight, and anything above 25 is usually considered overweight. Most people with a BMI of over 28 are considered to be at risk of illnesses associated with being overweight. The new treatment, Alli, is designed to treat people with a BMI of 28 or over.

To work out your Body Mass Index, please fill out your height and weight into the calculator below. You can enter metric measurements, imperial measurements or any combination of the two.

BMI Calculator






Your BMI is only a rough indication of your body's health. In particular, it cannot differentiate between fat and any other body tissues: it just considers total weight. For example, if you are an athlete or championship bodybuilder, for example, it's possible to be considered "overweight" according your BMI even though your body is carrying excessive muscle rather than excessive fat.

For most normal people, however, BMI is a reasonably good indicator of whether or not you are likely to be overweight.

You can only purchase Alli if your BMI is 28 or more, measured by using the calculator above.

Click here to purchase Alli or to visit the Alli page