Body Mass Index

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The Body Mass Index (BMI) is a convenient method for assessing your weight, if you are an adult and not pregnant.

NHS (UK) declares that a BMI over the healthy weight range can raise your risk of serious health problems, such as coronary heart disease, type 2 diabetes, stroke and some types of cancer.

However, the BMI has limitations and cannot determine whether you are carrying too much or too little fat, because it cannot tell the difference between excess fat, muscle or bone. Moreover, the method doesn’t take into account age, gender and muscle mass.

Our BMI calculator uses the ranges provided by NHS and WHO for both genders.

Underweight below 18.5
Healthy 18.5 to 24.9
Overweight 25 to 29.9
Obese 30 to 39.9
Severely Obese 40 or more


2016, Jan, 20. What is your BMI? Retrieved from

2016, Jul, 26. How can I work out my body mass index (BMI)? Retrieved from

2016, Jul, 12. What is the body mass index(BMI)? Retrieved from\n\n2016, Jun, 15. Obesity. Retreived from

2008, December, 8-11. Waist Circumference and Waist-Hip Ratio. Report of a WHO Expert Consultation. Retreived from


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Special thanks to G. Salcı and Y. Herrera for the translations into Turkish and Spanish respectively, and U. Waywell for editing texts in English.

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