BMI Calculator
Calculate body mass index from height and weight (metric or imperial).
How BMI is calculated
Body mass index is your weight divided by your height squared.
metric: BMI = weight_kg ÷ height_m²
imperial: BMI = 703 × weight_lb ÷ height_in²
FAQ
What are the BMI categories?
Standard adult categories: under 18.5 = underweight, 18.5–24.9 = normal, 25–29.9 = overweight, 30 or more = obese.
Is BMI accurate?
BMI is a quick screening number, not a diagnostic. It doesn't distinguish muscle from fat. Talk to a clinician for health decisions.
Results are for informational purposes only and are not professional financial, medical, or legal advice. Verify important numbers with a qualified professional before acting on them.