How to use the BMI Calculator in a few steps
The BMI Calculator is designed so you can get your result in under a minute. Follow these steps:
Step 1: Enter your height and weight
Start by typing your height and weight into the input fields. The calculator accepts whole numbers and decimals, so values like 1.75 m or 68.5 kg work fine.
Step 2: Choose your units
Pick metric or imperial units before entering your numbers. If you prefer pounds and inches, switch to imperial and the tool converts everything automatically.
Step 3: Get your BMI result
Hit the Calculate button. The tool instantly returns your BMI value, the category you fall into (underweight, normal, overweight, or obese), and the healthy weight range for your height.
What you need to get started
Only a modern browser such as Chrome, Firefox, Safari, or Edge. There is no installation and no signup — open the calculator, enter your two numbers, and read the result.
Verdict
With the BMI Calculator you get an instant, accurate body mass index from just two inputs. No app to install, no account to create.