BMI Calculator

Find out whether you’re a healthy weight for your height

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Your BMI result

<p class="f21">Your ideal weight is between $range </p>

<p class="f21"> Your ideal weight is between $range</p>

<p class="f21">Your ideal weight is between $range</p>

<p class="f21">Your ideal weight is between $range</p>

<p class="f21">Your ideal weight is between $range</p>

Underweight
Below 18.5
Healthy weight
24.9
Overweight
25
29.9
Obese
30 and over
Bmi Cover

What your BMI result means

A BMI score of under 18.5 is classed as ‘underweight’.

If you’re underweight, you might not be getting the energy or nutrients that your body needs. This can make you tired, and exercising might feel hard. It can also put you at risk of health conditions such as osteoporosis (brittle bones) and fertility problems.

How to increase your weight safely:

Aim for three balanced meals a day. These should include carbohydrates, protein, and healthy fats. If you want to gain weight, you can also include some nutrient-dense snacks. Good examples include:

  • a handful of unsalted nuts
  • a pot of Greek yogurt
  • peanut butter on wholegrain toast

Talk to a GP for more advice. You may also be referred to a dietitian to help you create a personalised meal plan.

What your BMI result means

A BMI score of between 18.5 and 24.9 is classed as a ‘healthy weight’.

Being a healthy weight can reduce your risk of developing health problems in the future, such as heart disease and type 2 diabetes.

Eating well will help you to maintain a healthy BMI. A balanced diet contains protein, fibre, and healthy fats to keep you fuller for longer. Reducing ultra processed foods  can help too.

You can increase the amount of energy you use by staying physically active. This means doing 150 minutes of moderate exercise a week, including two sessions of strength training.

What your BMI result means

A BMI score of between 25 and 29.9 is classed as ‘overweight’.

This BMI category is associated with a higher risk of health conditions, such as high blood pressure, heart disease and certain types of cancer.

If you want to lose weight, it can be helpful to start with small changes to your eating habits. Choosing fewer high-calorie foods, such as sugary drinks and ultra processed foods like biscuits and crisps, can make a difference over time. Eating lots of fibre and protein can keep you feeling fuller for longer, which may help you manage portions.

Managing stress and sleeping well can also make it easier to eat well. Increasing your physical activity has many benefits and can help to you to use more energy each day.

What your BMI result means

A BMI score of between 25 and 29.9 is classed as ‘overweight’.

This BMI category is associated with a higher risk of health conditions, such as high blood pressure, heart disease and certain types of cancer.

If you want to lose weight, it can be helpful to start with small changes to your eating habits. Choosing fewer high-calorie foods, such as sugary drinks and ultra processed foods like biscuits and crisps, can make a difference over time. Eating lots of fibre and protein can keep you feeling fuller for longer, which may help you manage portions.

Managing stress and sleeping well can also make it easier to eat well. Increasing your physical activity has many benefits and can help to you to use more energy each day.

What your BMI result means

A BMI score of over 30 is classed as ‘obese’.

This BMI category is associated with a higher risk of health conditions, such as heart disease, high blood pressure, cancer and type 2 diabetes.

If you want to lose weight, it can be helpful to start with small changes to your eating habits. Choosing fewer high-calorie foods, such as sugary drinks and ultra processed foods like biscuits and crisps, can make a difference over time. Eating lots of fibre and protein can keep you feeling fuller for longer, which may help you manage portions.

Managing stress and sleeping well can also make it easier to eat well. Increasing your physical activity has many benefits and can help to you to use more energy each day.

Reviewed by Julia Ebbens, Bupa Health Content Editor March 2024

Expert reviewer, Niamh Hennessy, Lead Dietitian, Cromwell Hospital

Next review due March 2027

This information was published by Bupa's Health Content Team and is based on reputable sources of medical evidence. It has been reviewed by appropriate medical or clinical professionals and deemed accurate on the date of review. Photos are only for illustrative purposes and do not reflect every presentation of a condition.

Any information about a treatment or procedure is generic, and does not necessarily describe that treatment or procedure as delivered by Bupa or its associated providers.

The information contained on this page and in any third party websites referred to on this page is not intended nor implied to be a substitute for professional medical advice nor is it intended to be for medical diagnosis or treatment. Third party websites are not owned or controlled by Bupa and any individual may be able to access and post messages on them. Bupa is not responsible for the content or availability of these third party websites. We do not accept advertising on this page.

  • Body mass index – BMI. World Health Organization. euro.who.int, accessed 22 April 2024
  • Obesity: identification, assessment and management. National Institute for Health & Care Excellence. nice.org.uk, accessed 22 April 2024.
  • A healthy balanced diet. British Nutritional Foundation. Nutrition.org.uk, accessed 22 April 2024.
  • Bone health checklist. The Royal Osteoporosis Society. theros.org.uk, accessed 22 April 2024
  • Underweight and fertility when planning a pregnancy. Tommy’s. www.tommys.org, updated 19 August 2023.
  • Healthy snacks: Food Fact Sheet. British Dietetic Association. www.bda.uk.com, updated January 2022
  • Help and Treatment. Beat. www.beateatingdisorders.org.uk, accessed 22 April 2024
  • Health matters: obesity and the food environment. Public Health England. www.gov.uk, published 31 March 2017
  • Macronutrients and energy balance. Oxford Handbook of Nutrition and Dietetics (3 ed). Oxford Medicine Online. www.oxfordmedicine.com, April 2020
  • UK Chief Medical Officers' Physical Activity Guidelines. Department of Health and Social Care. www.gov.uk, published 7 September 2019
  • Macronutrients and energy balance. Oxford Handbook of Nutrition and Dietetics (3 ed). Oxford Medicine Online. www.oxfordmedicine.com, April 2020
  • UK Chief Medical Officers' Physical Activity Guidelines. Department of Health and Social Care. www.gov.uk, published 7 September 2019
  • Body Mass Index: Considerations for Practitioners. Centers for Disease Control and Prevention. www.cdc.gov, accessed 24 April 2024
  • Weight management before, during and after pregnancy. National Institute for Health & Care Excellence. www.nice.org.uk, accessed 22 April 2024
  • Ríos-Prego M, Anibarro L, Sánchez-Sobrino P. Relationship between thyroid dysfunction and body weight: a not so evident paradigm. Int J Gen Med. 2019 Aug;12:299-304. doi: 10.2147/IJGM.S206983.
  • Depression signs and symptoms. Mind UK. mind.org.uk, accessed 24 April 2024.
  • Poti JM, Braga B, Qin B. Ultra-processed Food Intake and Obesity: What Really Matters for Health-Processing or Nutrient Content? Curr Obes Rep. 2017 Dec;(4):420-431. doi: 10.1007/s13679-017-0285-4.
  • Calorie counting. NHS. Nhs.uk, accessed 22 April 2024.
  • Fibre. British association of dietitians.bda.uk.com, last reviewed April 2021.
  • Razzoli M, Pearson C, Crow S, Bartolomucci A. Stress, overeating, and obesity: Insights from human studies and preclinical models. Neurosci Biobehav Rev. 2017 May;76(Pt A):154-162. doi: 10.1016/j.neubiorev.2017.01.026.
  • Kline, C.E., Chasens, E.R., Bizhanova, Z. et al. The association between sleep health and weight change during a 12-month behavioral weight loss intervention. Int J Obes 45, 639–649 (2021). https://doi.org/10.1038/s41366-020-00728-8

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