Calculate my body mass index

Use this calculator below to check your BMI and find out if you have a healthy weight.

What is the BMI?

The BMI or body mass index is a size that can be used to assess an individual's body size. It is calculated according to the size and the weight. This formula is designed for adults between 18 and 65 years old.

How to calculate my BMI?

The formula for your body mass index is the following:

The BMI is interpreted as follows:

Body mass index Weight Categories
Under 16.5 Severly Underweight
16.5 to 18.5 Underweight
18.5 to 24.9 Healthy Weight
25 to 29.9 Overweight
30 to 34.9 Obese
35 to 39.9 Severly Obese
Over 40 Morbidly Obese

Under 16.5: Severly Underweight

Your thinness poses risks to your health. At this point, it is recommended to consult a doctor to check your diet and maybe gaining weight.

16.5 to 18.5: Underweight

Your thinness poses risks to your health. At this point, it is recommended to consult a doctor to check your diet and maybe gaining weight.

18.5 to 24.9: Healthy Weight

Your weight is not at risk for your health. Continue to adopt your good eating and physical habits.

25 to 29.9: Overweight

You are overweight and the risk of developing cardiovascular disease increases. So that you can find an ideal weight for your health, try to change your eating habits and practice a sporting activity. Do not hesitate to get help from a health professional if needed.

30 to 34.9: Obese

You are considered in moderate obesity. This is the least serious form of obesity but there are still significant risks of diseases such as diabetes, hypertension and cancer. This risk increases if you have genetic factors that promote the development of these diseases.

35 to 39.9: Severly Obese

Your obesity is severe. At this stage, the risk of illness increases rapidly. It is therefore recommended that you lose weight. You can be a candidate for performing an obesity surgery.

Over 40: Morbidly Obese

Your obesity is morbid. This is the most serious grade of obesity, it is considered dangerous for your health. Some research has shown that once individuals reach this level of obesity, individuals would lose 2-5 years of life expectancy.

BMI : Exceptions

If your BMI indicates that you are obese, it is best to contact a doctor so that you develop together a slimming cure best suited for you. It is important to avoid the stage of obesity because in addition to the risks involved, such as diabetes or cardiovascular disease, your life expectancy can also be reduced.

There are some reservations about the effectiveness of this measure. The BMI is primarily an indicator and not an absolute value. It does not take into account sex, age, the distribution of fat in the body, or the ethnic origin of the person.

This formula is not reliable for calculating the BMI of some athletes and pregnant women. An athlete may have a BMI displayed overweight but be in perfect health because the "extra" weight is mainly muscle-based and not fat. Regarding pregnant women, it is not valid either because they take between 10 and 20 kg on average and are caused to lose all or part after giving birth.

The interpretation of the impact of BMI on the risk of mortality linked to obesity is therefore to be qualified in each case. What is important to know is that the rise in BMI is not consistently associated with the severity of obesity, nor with the increase in cardiovascular risk.

There are other criteria to know if a person is overweight or not:

  • Amount of body fat
  • Waist circumference: When the waist of a man is more than 100 cm and that of a woman to 88 cm. This abdominal obesity is to be watched since it represents an increased risk of diabetes and cardiovascular diseases.