BMI calculator

To find out your BMI, simply enter your details and leave the rest to Kellogg's BMI calculator! Drag the sliders to select your height in feet and inches or metres and your weight in either stones and pounds or kilograms.

You can switch between standard and metric by using the button above the sliders.

What's your weight?

What's your height?

If your BMI is 25 or over then the Special K 2 week kick-start plan is a great way to kick start you towards your slimming goal. See if you can see a difference in your shape in just 2 weeks.

If you are within a healthy BMI range but are still looking for ways to lead a healthier lifestyle then the Special K longer term healthy lifestyle plan can help you integrate healthier habits into your life and maintain them for the long term.

When you know which plan's right for you then create your own Special K Personal Plan.

The Body Mass Index calculation applies to both adult men and women, it does not apply to children. Your BMI may not be accurate if you're over the age of 60. This is because your bones may begin to weigh less as you get older. When you work out your BMI, remember to take into account your body frame and your build - your BMI may not be accurate. For example, your BMI may not be accurate if you're a weight-trainer, an athlete, or if you're pregnant, or breastfeeding.

Talk to your GP if you have noticeably lost, or gained, weight recently for no known reason and before starting any weight-loss program if you have a long-term health condition or you want to lose more than 20% of your body weight.