The Body Mass Index Calculator or the BMI Calculator can be utilized to calculate BMI value and weight status. This also takes into consideration, your age and height. You can use the metric units’ conversion if you find it more convenient to work with the international standard metric units.

It should be made clear that the BMI is a measurement of your body weight, which factors in your height and weight. Even though your BMI is not exactly a measure of your percentage of body fat, it is a useful technique to approximate a healthy body weight according to your height and age. Because of its convenience in measuring and calculating it, the BMI is the most popularly used diagnostic tool to indicate a person’s optimal weight according to his or her height. Your resulting BMI number will let you know if you are underweight, have normal weight, overweight, or obese. Nonetheless, because of the different kinds of body types, the distribution of bone mass and muscle, and the like, it is not proper to use this type of measurement as the sole or last indication for diagnosis.

How to Calculate BMI: The BMI Formula

You can calculate the BMI according to two of the most popularly used unit systems, through metric units or through U.S. units:

Metric Units

BMI = weight (kg)
height2 (m2)

U.S. Units

BMI = 703 x (weight (lb))
height2 (in2)

BMI Chart

The BMI Chart for Men and Women can be calculated based on the BMI Table for Adults. It is based on the World Health Organization’s or WHO’s suggested body weight, according to the BMI values for adults. These can be used after utilizing the BMI Calculator for Men or BMI Calculator for Women, for ages 18 and above.

Most importantly, the BMI calc indicates that you are severely thin if you have a BMI of less than 16. You are moderately thin if your BMI ranges between 16 to 17 and mildly thin if your BMI is somewhere between 17 and 18.5. Next, your weight is considered normal if your BMI is between the 18.5 to 25 BMI range. For those who are overweight and obese, you are considered as overweight if your BMI is between 25 to 30, in the obese class I if your BMA ranges somewhere between 30 to 35, in the obese class II if it is between 35-40, and in the obese class III if your BMI is greater than 40.

The BMI Calculator for Females and Males can be adjusted accordingly for children and teens that are ages 2 to 20 years old. Actually, the Centers for Disease Control and Prevention or the CDC suggests that the BMI categorization for children and teens be between ages 2 to 20 years old.

A child or a teen is underweight if they fall below the 5% percentile range. They would have a healthy weight if they were within the 5% to 85% percentile range. On the other hand, they are at risk of being overweight if their BMI falls inside the 85% to 95% percentile range. Lastly, the child or teen can be deemed as overweight if they fall outside the 95% percentile.

BMI Notes

Even though the BMI can be used for most men and women, there are some limits. BMI can overestimate body fat in athletes and other individuals who have a muscular build. In addition, it can also underestimate body fat in older individuals and those who have lost muscle.

At any rate, those who find themselves being overweight or obese, they should consider that they put themselves at a higher risk when they have heart disease and other conditions such as high blood pressure or hypertension, high LDL cholesterol or “bad” cholesterol, low HDL cholesterol or “good” cholesterol, high triglycerides, high blood glucose or sugar, family history of premature heart disease, physical inactivity, and cigarette smoking.

It is highly recommended that if you are overweight or obese and have other two or more risk factors, that you lose weight. Even if it is just a small weight loss of between 5% and 10% of your current weight, this will greatly decrease your risk of developing diseases connected to obesity. Please consider talking to your doctor to check whether you are at a higher risk and if you should lose weight. You doctor will analyze your BMI, waist measurement, and other related risk factors for heart disease.

Ponderal Index

The Ponderal Index or the PI is very similar to the BMI, as it measures the leanness of a person. Alternatively, it is also called the Rohrer’s index. The PI, nevertheless, comparatively speaking, is more even for different stature. Hence, it is typically used in the field of pediatrics. Using metric units, you can compute for the PI through the following formula:

PI = weight (kg)
height3 (m3)

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