BMI Calculator
Calculate your Body Mass Index with metric or imperial units.
How to use this tool
Enter height & weight
Use cm/kg or switch to feet-inches and pounds with one tap.
Hit Calculate
Your BMI appears instantly with a color-coded category badge.
Check your range
See the healthy weight range for your height.
Frequently asked questions
How is BMI calculated?
Weight in kilograms divided by height in meters squared (kg/m²). Imperial inputs are converted first, so the result is identical.
What do the categories mean?
Under 18.5 is underweight, 18.5–24.9 is the healthy range, 25–29.9 is overweight, and 30+ is obese — the standard WHO cut-offs.
Is BMI accurate for everyone?
BMI is a screening guide, not a diagnosis. Athletes with high muscle mass, pregnant people, and the elderly can get misleading readings — treat it as a starting point.
What is a healthy weight for my height?
We show the weight range that keeps your BMI between 18.5 and 24.9 — the band associated with the lowest health risks.
Is my data stored?
No. The calculation happens entirely in your browser.