BMI Calculator
Calculate adult body mass index from metric or imperial measurements and view the standard screening category and weight range.
BMI is a screening measure, not a diagnosis. Interpret it with a qualified clinician when health decisions matter.
Formula
Metric BMI is weight in kilograms divided by height in meters squared. Imperial inputs are converted to the same metric formula before calculation.
Frequently Asked Questions
Is BMI a diagnosis?+
No. BMI is a population-level screening measure and does not account for body composition, age, pregnancy, or individual medical context.
What BMI range is generally considered healthy for adults?+
Standard adult screening categories generally place a BMI from 18.5 through 24.9 in the healthy-weight range.
Do metric and imperial measurements produce the same BMI?+
Yes. The imperial values are converted before calculation, so equivalent measurements produce the same result apart from rounding.