BMI
Estimate adult BMI from height and weight for a screening reference. Use this free bmi for fast, clear results with no signup required.
BMI guide
What it is for
The BMI compares weight and height as an adult screening measure.
How it is calculated
BMI = kilograms / meters². Convert pounds by 0.45359237 and inches by 0.0254 before calculating; displayed ranges are adult screening categories.
Assumptions
It assumes the units and inputs describe an adult. It does not adjust for muscle mass, pregnancy, age, or fat distribution.
Example
At 150 lb and 65 in, BMI is approximately 25.0. The result is a screening number, not a diagnosis or direct body-fat measurement.
Limitations
BMI does not diagnose health or replace clinical evaluation; use it as a conversation starter with a qualified professional.
Public source: CDC: About Adult BMI