BMI Calculator

Calculate your Body Mass Index using your height and weight.

Enter your weight in kilograms.
Enter your height in centimeters.
Your BMI

What Is BMI?

BMI, or Body Mass Index, is a numerical value calculated from a person's weight and height. It is commonly used as a general screening measure for weight categories in adults.

BMI Formula

BMI is calculated by dividing weight in kilograms by height in meters squared.

BMI = Weight (kg) ÷ Height² (m)

Adult BMI Categories

BMI Category
Below 18.5 Underweight
18.5 – 24.9 Healthy Weight
25.0 – 29.9 Overweight
30.0 or above Obesity

How to Use Our BMI Calculator

Enter your weight in kilograms and height in centimeters. Click the "Calculate BMI" button and your BMI will be displayed instantly along with a general BMI category.

Frequently Asked Questions

What is a normal BMI?

For adults, a BMI from 18.5 to 24.9 is generally categorized as a healthy weight range.

Is BMI the same for everyone?

BMI is a general screening measure and does not directly measure body fat. It may not accurately reflect health for every individual.

Is this BMI calculator free?

Yes. Our BMI calculator is completely free to use.

Important: This calculator is provided for general informational purposes and is not medical advice. BMI has limitations and should not be used by itself to diagnose a health condition or determine an individual's health status.

Learn More About BMI

Want to understand how BMI is calculated, the BMI formula and standard BMI categories? Read our detailed guide:

How to Calculate BMI: Formula, Categories & Examples

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What Is a BMI Calculator?

A BMI Calculator is a simple online tool that estimates Body Mass Index (BMI) using a person's height and weight. BMI is commonly used as a general screening measure to compare body weight with height.

How to Calculate BMI

BMI is calculated by dividing a person's weight in kilograms by the square of their height in meters.

BMI Formula: BMI = Weight (kg) ÷ Height² (m)

For example, if someone weighs 70 kg and is 1.75 meters tall, their BMI is approximately 22.9.

BMI Categories

For adults, BMI is commonly grouped into the following categories:

Who Can Use a BMI Calculator?

A BMI calculator can be useful for adults who want a quick estimate of their BMI. It can be used at home, at the gym or anywhere you have access to a web browser.

BMI is only a screening measure and does not directly measure body fat. Factors such as muscle mass, age and overall health can affect how BMI should be interpreted.

BMI Calculator FAQs

What does BMI mean?

BMI stands for Body Mass Index. It is a numerical value calculated from height and weight and is commonly used as a general screening measure.

Is BMI the same as body fat percentage?

No. BMI is calculated from height and weight, while body fat percentage estimates how much of the body is made up of fat.

Can BMI be used for everyone?

Standard adult BMI categories are not appropriate for every person or situation. Children, teenagers, pregnant people and some athletes may need different methods of assessment.

Use our free BMI Calculator above to quickly calculate your BMI from your height and weight.