# BMI calculator. Simple and precise

## What is BMI?

Have you ever wondered, what is BMI and what does it show? If you want to find out and learn how to calculate it, keep reading this article.

BMI stands for "body mass index" - it's a measurement of one's weight in accordance to the height of this person. It allows to notice the fat level of a person: while it doesn't show directly the amount of fat in body, at the same time the BMI can tell, whether the amount is big, regular or small.

## How to calculate BMI?

But if you want to calculate to your BMI manually, you have to divide your body weight (in kgs) by the square of your height (in meters).

BMI formula: mass / height * height

This way, you will get a value, which is assigned to a specific category: underweight, normal weight or overweight. If you're not sure how to make the calculation on your own, you can use BMI calculator.

## What is healthy BMI?

The normal value of BMI ranges from 18,5 to 24,99. It means, that if your BMI is between those values, you weigh correctly for your height. I.e., for person of height 1,6m the perfect weight will vary from 43 to 64 kgs. You cas see it on image below (image from Wikipedia).

Don't take the values too seriously though: if your BMI is 0,5-1 points higher or lower than maximum or minimum - it doesn't necessarily mean, that something is wrong with your weight.

The BMI for male and female can be slightly different but BMI value will be similar for both in most cases.

## BMI for man and woman

The reason for the difference between male's and female's BMI score is that women need more fat in their body to function. It's caused by proper sexual and hormonal functioning.

It's impossible to take information about your gender into account while calculating BMI on your own. However, using an online calculator, you can get a more accurate result.

## BMI for young and old

First of all, BMI isn't used for childer below age of 14 - as for children at this age or younger, we tend to use percentile meshes.

In general the older you get, the better is your BMI. It's because at the old age people lose bone and muscle tissue - usually in favor of fat.

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