Why You Can’t Always Trust Your Bmi

Why You Can’t Always Trust Your BMI #bmi #weightloss #health BMI or Body Mass Index is one of the most popular methods that people use to determine their healthy weight range. Many experts consider that BMI is not accurate enough and can lead to misguided exercising and dieting decisions if used all by itself. Before we get into the nitty-gritty however, let’s go through a short history of BMI and how it got to be such a popular measurement tool.

The BMI was created by Adolphe Quetelt in the 1800s and while the formulas might have been adjusted over time, the core principles still stand: it compares your weight to your height and it determines if you are in 6 of the following weight categories:


The normal or healthy weight rage is between 18.5 and 24.9. You are considered overweight if you are over 24.9 and underweight if you are below 18.5.

If you want to find you BMI you have to take your height in meters squared and divide your weight in kilograms. Calculate you BMI here. For added accuracy, if you want to find out what your body fat levels are, you can use a Body Fat Percentage Calculator.

BMI’s formula does not include the body type, muscle, bone size and body fat as variables, which is why it’s only reliable in the hands of a nutritionist who can measure all of them. For example, a short bodybuilder with lots of muscle mass might actually end up in the Obese range, despite being fitness contest-ready. Muscles weight more then fat and take less physical space, so a pound of fat will make you look at lot larger than a pound of muscle. Similarly, tall people, with longer bones and children don’t get an accurate BMI.

Last but not least, the BMI formula doesn’t differentiate between men and women body types – since men tend to have larger bone structure and women naturally have more body fat simply adds to the inaccuracy of simple BMI calculators. 

Alternatives to Body Mass Index:

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