BMI Calculator
Calculate your Body Mass Index and health category.
Body Mass Index (BMI) estimates body fat from height and weight. Enter your measurements in kg/cm or lb/ft-in to get your BMI number and a standard category (underweight through obese).
BMI is a screening tool, not a diagnosis—it does not account for muscle mass or body composition. Use it alongside advice from a healthcare provider when making health decisions.
Frequently Asked Questions
BMI (Body Mass Index) is a measure of body fat based on height and weight. It helps categorize weight as underweight, normal, overweight, or obese.
BMI doesn't account for muscle mass, bone density, or body composition. Athletes may have high BMI due to muscle. It's a screening tool, not a diagnostic.
A BMI between 18.5 and 24.9 is generally considered normal. Below 18.5 is underweight, 25–29.9 is overweight, and 30+ is obese.