BMI Calculator

Answer: Body Mass Index (BMI) = weight ÷ height²; in US units BMI = (pounds ÷ inches²) × 703, with categories underweight (<18.5), normal (18.5–24.9), overweight (25–29.9), and obese (≥30).

Weight (lb)

Height (ft)

Height (in)

24.4Normal weight

Under <18.5

Normal 18.5–24.9

Over 25–29.9

Obese 30+

BMI is an informational estimate only. Talk to a clinician for health decisions.

How to use this free BMI calculator

Select US customary (lb/in) or metric (kg/cm).
Enter your height and weight.
Read your BMI value and WHO-style category label.