Online Diet BMI Calculator

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Online Diet - Calculate BMI

BMI, which stands for Body Mass Index, is a measurement used to assess body fat based on an individual's height and weight. BMI is used to categorize individuals into different weight categories, which can help evaluate the risk of certain health conditions related to being underweight, overweight, or obese.

The World Health Organization (WHO) has established the following BMI categories:

  • Underweight: Below 18.5
  • Normal weight: 18.5 to 24.9
  • Overweight: 25 to 29.9
  • Obese: 30 or Higher

In addition, percentile is widely used to interpret the BMI for teens and children:

  • Underweight: Below 5%
  • Healthy Weight: 5% to 84.9%
  • Overweight: 85% to 94.9%
  • Obese: 95% or Higher

Please remember, however, that BMI calculators are only one of many possible ways to assess your weight and should not be used as the sole method for determining whether or not you have healthy body weight. If you have any concerns about your weight, please discuss them with your trained physician, who can better address your specific situation.

Online Diet BMI Calculator – How It Works

Our BMI calculator is straightforward to use. To begin with, click on the Get Started button. You will then be asked to enter your date of birth. The Online Diet BMI Calculator can calculate both children’s and adults’ BMI. Hence, it can help determine the weight status category of individuals aged 2 to 120.

The calculator will require the users to specify their birth gender. That said, the BMI interpretation for adults aged 20 and older follows standard weight status categories. Such categories are similar for adult men and women of all ages and body types.

Meanwhile, for teens and children, the BMI is interpreted differently, even though the same formula as adult BMI is used. For teens and children, the BMI interpretation has to be age and gender-specific as the amount of body fat changes along with age. In the same way, the amount of body fat is different between boys and girls. The Online Diet calculator will visually show Adult BMI and Percentile Ranking to show the differences.

Other information required to calculate your BMI includes your height and current weight. Once the required fields are filled in, the calculator will do the computation, and you will see the table that will help you identify whether you have a healthy weight or are underweight, overweight, or obese, depending on what range the value of your BMI falls between.

On Imperial and Metric Systems of Measurements

Imperial and Metric are two different systems of measurement used to express the magnitude or size of various physical quantities.

The Imperial system is primarily used in the United States and the United Kingdom. In contrast, the Metric system, also known as the International System of Units (SI), is used globally as the standard measurement system.

The main difference between these two systems is the units of measurement used for each quantity. For example, in the Imperial system, length or distance is typically measured in inches, feet, yards, and miles. In contrast, in the Metric system, it is measured in millimeters, centimeters, meters, and kilometers. Similarly, weight is measured in pounds and ounces in the Imperial system, while in the Metric system, it is measured in grams and kilograms.


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