BMI Calculator

Use this tool to calculate your BMI based on your height and weight.


Do you have any suggestions to improve this page ?

How is BMI interpreted ?

This table is valid for an adult male or female (see 'BMI index Limits' below).

BMI Interpretation
less than 16.5 Malnutrition
from 16.5 to 18.5 Underweight
from 18.5 to 25 Normal weight
from 25 to 30 Overweight
from 30 to 35 Moderate obesity
from 35 to 40 Severe obesity
greater than 40 Morbid obesity

What is BMI?

BMI or Body Mass Index provides information on an individual's height-weight ratio. It is calculated with a relatively simple mathematical formula,

`\text{BMI} = \text{Weight in kg} /(\text{(Height in cm)} * \text{(Height in cm)})`

BMI is used to find out if your weight is suitable for your height. For a given weight and height of an individual, it is possible to statue quickly whether he is overweight, obese, lean, or normal build.

What is a BMI too high or too low risk ?

Overly high BMI is often linked to risks of diseases and malfunctions including (non-exhaustive list),
- high blood pressure
- myocardial infarction
- type 2 diabetes
- rheumatological problems
- sleep apnea

A too low BMI may be related to the following risks (non-exhaustive list),
- malnutrition, nutrient deficiency (vitamins, minerals ...)
- weakened immune system (immunosuppression)
- osteoporosis

As a result, too low or too high BMI lead to the risk of serious illnesses and can significantly affect the person's quality of life. If you are in this case, medical follow-up is recommended in order to regain a more adequate body. A rebalancing of the diet, possibly associated with the practice of a suitable sports activity, can help to regain good physical fitness and normal BMI.

BMI Index Limits

The BMI index as calculated above is not adequate for children, adolescents, seniors over 65 years of age, pregnant women, very sporty people, amputees, giant or dwarf people.

See also

Calculate your Body Fat
Calculate your ideal weight
BMR calculator