BMI (Body Mass Index) is a simple measure of body fat based on your height and weight. It is calculated by dividing your weight in kilograms by the square of your height in meters.

Is BMI an accurate measure of health?

BMI is a useful screening tool but does not directly measure body fat. It does not account for muscle mass, bone density, age, or sex. Athletes or muscular individuals may have a high BMI without excess body fat.

What is a healthy BMI?

A BMI between 18.5 and 24.9 is generally considered normal weight. Below 18.5 is underweight, 25-29.9 is overweight, and 30 or above is classified as obese.

Does this work for children?

This calculator is designed for adults (18+). BMI for children and teens uses age- and sex-specific percentiles and requires a different calculation method.

BMI Calculator

Calculate your Body Mass Index with metric or imperial units

Height (cm)

Weight (kg)

About BMI Calculator

Body Mass Index (BMI) is a widely used screening measure that estimates body fat based on height and weight. This calculator supports both metric (kg/cm) and imperial (lbs/ft-in) units, provides a visual BMI scale, and shows your healthy weight range for your height.

How to Use

Select your preferred unit system — Metric or Imperial.
Enter your height (cm or feet/inches).
Enter your weight (kg or lbs).
Click Calculate BMI to see your result, category, and healthy weight range.

Features

Health Categories

See your BMI category from underweight to obese with color coding

Healthy Weight Range

Shows the healthy weight range for your specific height

Visual BMI Scale

Color-coded scale with a pointer showing where you fall

Metric & Imperial

Switch between kg/cm and lbs/ft-in with one click

FAQ

Related Tools

Calculator

Basic calculator for mathematical operations

Average Calculator

Calculate the average of a set of numbers

Area Calculator

Calculate area and perimeter for 9 shapes — rectangle, circle, triangle, trapezoid, ellipse & more

GST Calculator

Calculate GST, add or remove tax from prices

Unit Converter

Convert between different units of measurement

Percentage Calculator

Calculate percentages and percentage changes

BMI Calculator

About BMI Calculator

How to Use

Features

FAQ

What is BMI and how is it calculated?

Is BMI reliable for everyone?

Does this calculator work for children?

Is my data stored or shared?

Related Tools

BMI Calculator

About BMI Calculator

How to Use

Features

FAQ

What is BMI and how is it calculated?

Is BMI reliable for everyone?

Does this calculator work for children?

Is my data stored or shared?

Related Tools