BMI Calculator

BMI = weight (kg) ÷ height (m)² — the Quetelet index. Adult results can be placed on WHO-style category bands. BMI does not measure body fat or muscle and is not a diagnosis. Athletes, older adults, pregnancy, and some populations need clinical interpretation.

DoseFirst BMI & Weight tools provide general educational estimates only. They are not medical advice, diagnosis, or treatment. Talk with a qualified clinician before making health decisions.

This BMI calculator estimates body mass index from your height and weight using the standard Quetelet formula. Calculations run in your browser. BMI is an educational screening number, not a diagnosis.