How do I calculate BMI?

BMI, or Body Mass Index, is a method for calculating your body mass, which in turn helps identify how much fat your body is storing. For health purposes as well as for weight loss, it is important to have more muscle mass than fat.

Muscle weighs more than fat, so you can never rely on body weight alone to determine how much fat you have. Instead, you should calculate your body mass by using a BMI calculator. There are different methods that can be used to calculate your body composition, although the BMI method is one of the most accurate.

To calculate your BMI, multiply your weight (in pounds) by 703 and divide it by your height in square inches (or just divide by inches two times). A BMI number of between 18.5 and 24.9 is considered a normal body mass index. To avoid doing the math calculations just try out our online BMI calculator!

Why BMI Matters

Weight is an important factor of health, whether you are too thin or whether you are too heavy. Knowing the right weight for you, however, is not as simple as reading the number on a scale. You cannot go by scale weight alone. Muscle helps burn fat, so the more muscle you have the less fat you will have but the more you will actually weigh on a scale. Charting your weight and your height can help you gauge what your body fat is in relation to the expected standard. Once you know what your BMI is then you can act on that accordingly.

Calculating Your BMI

The two components to BMI are height and weight; and then their relationship to each other gets charted to determine your fat risk category. In order to measure your height, you should stand barefooted (or in socks if necessary but no shoes) and stand on a flat surface with your heels together and your back, butt, and shoulders flat against a wall. Your height is then determined by the tallest part of your head, so mark this point accordingly (either on the wall or a growth chart of some sort). Measure your height and round it off to the nearest quarter inch. Convert your height of feet and inches all into inches. To do this in metric, measure your height in centimeters.

In order to measure your weight, you will need a scale. The scale needs to be placed on a hard level surface and you need to stand flat and straight on it wearing as little clothing as possible (none would be best). The scale will provide you with the output of your weight. In order to calculate your BMI, round your weight to the nearest pound. To do this in metric, measure your weight in kilograms.

Once you have your height and weight, you can calculate your BMI using one of the formulas or you can simply use the BMI calculator on this website. Reminder: To calculate your BMI manually, take your weight, multiply it by 703, and then divide it by your height in inches. Take this number and then divide it by your height in inches again. Another way to do this is to take your weight, multiply it by 703, and then divide it by your height in square inches. The resulting number is your BMI value.

It is important to note that children should also have their BMI calculated, especially with the rise of obesity among children in our current culture. In order to calculate a child’s BMI, the age in years and months also needs to be factored in along with the child’s height and weight. The Child BMI calculator on this website makes it easy to determine your child’s BMI value.

Understanding BMI Calculation Results

There are four categories for BMI calculation results. They are Underweight, Normal, Overweight, and Obese. Out of all four categories, obese is the most dangerous for your health, although underweight can be just as dangerous and overweight comes with its own maladies. If your BMI is not normal, then it is a good idea to start a healthy food and exercise regimen that can help you compensate for your weight issues and get your BMI to where it needs to be.

A normal BMI ranges between 18.5 and 24.9. Any number below 18.5 indicates a potential problem with being underweight. A BMI range of 25 to 29.9 indicates the possibility of being overweight while a BMI that is calculated at 30 or higher is a sign of obesity. All BMI values are intended to be strictly a gauge of fat and body composition and it does not replace the advice of your physician. It does, however, give you a general guideline as to where you fall on the BMI chart, giving you a clearer picture of what you might need to do in order to get healthier.

Calculate your BMI now by using the BMI calculator found on this website.