BMI Calculator

Check your BMI

Body Mass Index – (BMI) is a handy guide to the healthy weight range for your height, it's used by the government and health professionals.

At Slimming World we'll never tell you what you should weigh or what your personal target weight should be. However, if you'd like some help in deciding your personal weight loss goal, your BMI can serve as a guide for most of us. You can also use our Weight Range Chart to give you another way to view your weight to height ratio and to help set your weight loss goals.

To calculate your BMI you need to know your height in metres and your weight in kilograms; then divide your weight by your height squared. Or just enter your height and weight (in either metric or imperial measurements) into our handy BMI calculator below.

Note: A BMI guide may not be accurate for people with a high muscle mass or mums–to–be and shouldn't be used for under 16s. The point at which someone's health is at risk due to their weight also varies between ethnic groups.

If you're 11–15 years old ask for our special Free2Go guide in group – it has BMI charts suitable for your age range.

your weight

  • *

your height

  • *

Find your nearest group

Lose weight without hunger! You'll find more delicious recipe and menu ideas at your local group, along with all the help you need to get started and reach your target weight.

or become an online member

Featured recipe

Smoked salmon and dill scrambled eggs
Smoked salmon and dill scrambled eggs

This could be a luscious lunch or a treat of a bre...

Read more

Free 7 day menu

Free 7-day menu

Try Food Optimising for free with our 7-day menu… you'll love the results!

Read more