BMI formula
BMI equals weight in kilograms divided by height in metres squared.
Screening, not diagnosis
BMI is a population-level screening measure and does not directly measure body fat, muscle mass, fitness, or health.
When context matters
Pregnancy, childhood, older age, athletic builds, some disabilities, and individual clinical circumstances can make BMI categories less informative. Discuss health decisions with a qualified clinician.
Frequently asked questions
Are results saved or uploaded?
The calculation runs in your browser. Tooliyapa does not require an account to use this calculator.
Should I verify an important result?
Yes. For financial, health, academic, engineering, legal, or other consequential decisions, verify the inputs, assumptions, and result against an appropriate authoritative source or qualified professional.