BMI Calculator

The BMI Calculator (Body Mass Index) is a tool that helps individuals assess their overall body weight relative to their height. It offers two unit systems: Imperial (feet, inches, pounds) and Metric (centimeters, meters, kilograms). Users input their height and weight, choosing the appropriate units. The BMI calculator then computes the BMI, BMI category, BMI Prime, over/under limit percentage, and provides information on hazard ratios for all-cause mortality based on BMI. The results, including a visual representation with a line graph, assist in understanding one’s weight status and potential health implications.

BMI Calculator

Select Unit System:

Height:

Weight:

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Introduction of BMI

Ever heard of BMI ? It’s kind of like a quick check-in to see if your weight is in a healthy zone for your height. Think of it as a estimate, not a perfect science. But it can be a helpful nudge to see if you might need to talk to a doctor about your weight.
Based on a person’s height and weight, BMI calculates their leanness or corpulence and is used to define tissue mass.
View the table below to view the many BMI-based categories that the BMI calculator uses.

BMI calculation formula

The Body Mass Index (BMI) is calculated using the following formula:

$� � � = \frac{� � � � ℎ � (� �)}{ℎ � � � ℎ � (�)^{2}}$

Where:

$� � � � ℎ �$ is the person's weight in kilograms.
$ℎ � � � ℎ �$ is the person's height in meters.

To calculate BMI, you first square the height in meters and then divide the weight in kilograms by the squared height. The resulting value gives an indication of a person's body mass relative to their height.

6ft height , 70 kg weight . BMI calculation example .

To calculate the BMI for a person with a height of 6 feet (which is equivalent to 1.8288 meters) and a weight of 70 kilograms, you can use the BMI formula:

$� � � = \frac{70 kg}{(1.8288 m)^{2}}$

First, square the height:

$(1.8288 m)^{2} = 3.3449 m^{2}$

Now, plug the values into the BMI formula:

$� � � = \frac{70 kg}{3.3449 m^{2}}$

Finally, calculate the result:

$� � � \approx 20.9$

So, the BMI for a person with a height of 6 feet and a weight of 70 kg is approximately 20.9.

BMI divisions and classes

Table

Category	BMI range (kg/m2)	BMI Prime	Risk level
Very severely underweight	less than 15	less than 0.60	Moderate
Severely underweight	15 - 15.9	0.60 - 0.64	Moderate
Underweight	16 - 18.4	0.64 - 0.74	Moderate
Normal (healthy)	18.5 - 24.9	0.74 - 1.0	Very low
Overweight	25 - 29.9	1.0 - 1.2	Low
Moderately obese	30 - 34.9	1.2 - 1.4	Moderate
Severely obese	35 - 39.9	1.4 - 1.6	High
Very severely obese	40+	1.6+	Very high

BMI Calculator

Introduction of BMI

Table of Contents

BMI calculation formula

6ft height , 70 kg weight . BMI calculation example .

BMI divisions and classes

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