Health & timeFree
Free BMI calculator for adults using metric or imperial units. See BMI value and WHO adult reference category. Not medical advice.
BMI is a rough screening number only — not a diagnosis. It does not account for muscle mass, age, sex, or medical conditions. Talk to a clinician for health decisions.
BMI is not a complete health assessment. It does not diagnose disease and should not replace professional medical advice. If you have health concerns, consult a qualified clinician.
Body Mass Index estimates body size from weight and height: kg divided by meters squared.
BMI can misclassify muscular people. It is only a rough population screening tool.
No. WHO adult reference bands are shown for context only.
Pediatric BMI uses different charts. This page is aimed at adult reference ranges.