BMI calculator

BMI -
Classification -
Formula -
Healthy weight range -
Weight unit -
Reference 18.5-24.9

BMI is a general screening number and does not replace medical evaluation.

See examples

Metric BMI

Enter weight in kilograms and height in centimeters to calculate BMI.

Imperial BMI

Switch to imperial units to use pounds, feet, and inches.

Basic screening

Check the BMI category and remember that BMI is a general screening measure, not a diagnosis.

About this helper

This BMI calculator computes body mass index from weight and height directly in your browser. It supports metric and imperial units, shows the formula used, and gives a basic category based on common BMI ranges. BMI is only a general screening number and does not replace medical advice.

Is my weight or height uploaded?

No. The BMI calculation runs locally in your browser and the values are not sent to Heavens Help servers.

What formula does the calculator use?

Metric BMI is kg divided by meters squared. Imperial BMI is 703 times pounds divided by inches squared.

Is BMI a medical diagnosis?

No. BMI is a broad screening number and does not consider muscle mass, pregnancy, age, body composition, or medical history.