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BMI Calculator

Calculate your Body Mass Index in metric or imperial units.

Units
Your result
BMI
22.9
Category
Normal weight
Healthy weight range
56.7–76.3 kg
UnderNormalOverObese

BMI is a general screening tool, not a medical diagnosis. It does not account for muscle mass, age, or body composition. Consult a healthcare professional for personal advice.

Your height and weight are processed entirely in your browser and are never sent anywhere.

About the BMI Calculator

This BMI calculator finds your Body Mass Index from your height and weight in either metric (cm/kg) or imperial (ft-in/lbs) units. It shows your BMI number, where you fall on the WHO category scale from underweight to obese, and the healthy weight range for your height so you have a target to work toward. The color-coded scale makes it easy to see your result at a glance, and every calculation runs privately in your browser.

BMI Calculator features

  • 01

    Metric and imperial

    Enter centimeters and kilograms, or feet, inches, and pounds. The calculator converts everything internally and gives the same accurate BMI either way.

  • 02

    Visual WHO category scale

    A color-coded bar plots your BMI across the underweight, normal, overweight, and obese ranges so you instantly see where you stand.

  • 03

    Healthy weight range

    Along with your BMI we show the weight range that corresponds to a normal BMI for your exact height, in your chosen units.

BMI Calculator FAQ

How is BMI calculated?
BMI equals your weight in kilograms divided by the square of your height in meters (kg/m²). For imperial units the calculator converts pounds and inches for you before applying the same formula.
What is a healthy BMI range?
The World Health Organization classifies a BMI from 18.5 to 24.9 as the normal range. Below 18.5 is underweight, 25 to 29.9 is overweight, and 30 or above is obese.
What is a normal BMI for my height?
The calculator shows the weight range that keeps your BMI between 18.5 and 24.9 for your specific height, so you can see a healthy target weight directly.
Is BMI accurate for everyone?
BMI is a useful general screening tool but it doesn't distinguish muscle from fat and doesn't account for age, sex, or body composition. It's an estimate, not a diagnosis — talk to a healthcare professional for personal advice.
Is my data kept private?
Yes. Your height and weight are processed entirely in your browser and are never sent to a server or stored anywhere.

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