BMI Calculator

Calculate your Body Mass Index(BMI) and the corresponding BMI weight status category.
Unit Standard
Height Details
cm
Weight Details
30 kg
150 kg
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What is BMI (Body Mass Index) calculator ?

A Body Mass Index (BMI) calculator is a tool used to assess an individual's body weight in relation to their height. It is a widely used method to categorize individuals into different weight status categories, such as underweight, normal weight, overweight, and obesity.

BMIClassification
less than 18.5Under Weight
18.5 - 24.9Normal Weight
25 - 29.9Over Weight
30 - 34.9Obesity Class 1
35 - 39.9Obesity Class 2
40 or aboveObesity Class 3

Reference : Body mass index - wikipedia

BMI can be calculated using either metric units or US units, depending on the preference of the user and the measurement system commonly used in a particular region. Here's how you can calculate BMI in both metric and US units:

BMI Calculation in Metric Units

Formula : BMI = weight in kilograms / (height in meters)2

Example :

Weight : 70 kg, Height: 175 cm(1.75 m)
BMI = 70 / 1.752 = 22.86

BMI Calculation in US Units

Formula : BMI = weight in Pounds / (height in inches)2 * 703

Example :

Weight : 160 lbs, Height: 5 feet 10 inches (70 inches)
BMI = 160 / 702 * 703 = 22.96

Advisory

This tool is not meant to serve as a source of clinical guidance and is not intended to be a substitute for professional medical advice.

It's important to note that BMI has its limitations and may not account for factors like muscle mass or distribution of fat, so it should be used as a general screening tool rather than a definitive measure of health.

Author Information

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Rajesh V U

Full-Stack Developer & Storage Technologist | Creator of UnitSmash.com
Last updated: May 1, 2026

I am a Storage Technologist with strong experience in enterprise storage systems, Angular development, and web-based tools. I enjoy building practical calculators, converters, and utilities, and I also create original cartoons. I share my tools, articles, and creative work on my personal website, rajeshvu.com.