All About Body Mass Index (BMI)

Whether you want to lose weight, gain weight, stay  healthy, develop bulky muscles, or are concerned if you're obese, it is important that you understand what body mass index is.

Body Mass Index or BMI, is the most commonly used formula to determine the level of obesity. Under the International System of Units (SI), BMI is calculated by dividing a person’s weight in kilograms by the square of the person’s height in kilograms. In the United States, the BMI is calculated by multiplying a person’s weight times 703 and then dividing this result by the square of the person’s height in pounds. The result of these calculations will then determine if you’re overweight, underweight, or have ideal weight.

Usually BMI value settings are as follows:

A BMI number over 30 may be the signs of person with obesity.

A BMI value over 25 will suggest a person is overweight.

A BMI level between 18.5 to 25 may indicate an optimal or ideal weight.

A BMI level of under 18.5 indicates the person might be underweight.

A BMI measurement under 17.5 could mean the person is anorexia.

To make it easier for you, use the free BMI calculator below to find out your Body Mass Index value.