Calculators
BMI Calculator
Calculate body mass index with metric or imperial units.
About this tool
The BMI Calculator estimates body mass index from height and weight in metric or imperial units and shows the standard category. BMI is a quick screening figure, not a diagnosis.
Frequently asked questions
Under 18.5 is underweight, 18.5–24.9 normal, 25–29.9 overweight, and 30+ obese, per WHO ranges.
It's a rough screen and doesn't account for muscle mass or body composition, so athletes and others may not fit neatly.