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What is BMI?

Big Macs Inside? Belly Might Implode? Good guesses, but BMI actually stands for Body Mass Index, and it’s a really important measure for anyone trying to lose weight. Calculating your BMI using our simple BMI calculator will show you where you are now, and where would be best for you.

What does it mean for you?

The results are given as a range because there’s not one ideal weight for people of different heights and builds. Your BMI is also influenced by your age and whether you’re male or female. Some people can also be considered ‘overweight’ (25-29.9 BMI), yet have reasonably (or very) low body fat and just be quite muscular.

At your first appointment, your Consultant will tell you more about how important a healthy BMI is. They’ll also take your waist measurement – that’s the best way to see how much fat you’re carrying. As your BMI reduces, your waistline will too.

Does gender influence BMI score?

The short answer is no. A BMI calculator for men and women is the same! It only changes for children and teenagers where the BMI checker also considers age and gender. This is because male and female height and weight changes in a different manner during growth and development.

Check your BMI

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Your BMI score is: 0 You are normal weight

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What your BMI means

BMI below 18.5 = Underweight

You don’t need to lose weight. Your BMI shows you are already underweight for your height and your health could be at risk by limiting your calories. It may be worth talking to your GP.

BMI 18.5 – 24.9 = Healthy Weight

Nice one! You are an ideal weight for your height. Want some healthy recipe inspiration to keep you on track? Check out our blog.

BMI 25 – 29.9 = Overweight

Your weight is above the ideal range for your height, but help is at hand. Find a Consultant near you and start moving back into that healthy weight range. If you need some success story motivation, read how dieters have achieved their goals with one-to-one support on our blog.

BMI 30 – 39.9 = Obese

Your weight is above what is ideal and could increase your risk of health issues. Visit our How it works page to find out more about how The 1:1 Diet could help. Find a Consultant to get the support you need to get back to a healthy BMI range.

BMI 40+ = Very Obese

You are seriously at risk of health issues. Find a Consultant now for the help and support you need to get back to a healthy BMI.

Is BMI accurate and reliable?

BMI is a quick and easy way of working out if you are considered to be in a healthy weight category and it’s used regularly by the NHS.

However, it does not take into account other important factors such as proportion of muscle mass, age, and measurements like waist and hips.

While BMI is a good indicator, it’s always best to use it as part of a range of measurements, like a waist circumference measurement, which your Consultant will take on your first appointment.

How can The 1:1 Diet work for you?

People to keep you motivated

Everyone needs support. A personal diet Consultant will cheer you on.

Products you’ll actually enjoy

Everyone deserves tasty food. You’ll love The 1:1 Diet meal replacements.

A Plan that really works for you

Everyone’s different. You’ll get a personalised diet plan that suits you.