Understanding Your BMI
Body Mass Index (BMI) is a widely used screening tool that estimates body fat based on your height and weight. It divides adults into categories — underweight, normal, overweight, and obese — to help flag potential health risks early. While BMI doesn't measure body fat directly, it correlates well with more precise methods and is recommended by the WHO as a first-step assessment.
Keep in mind that BMI has limits: it doesn't distinguish between muscle and fat, so athletes may score higher without excess fat. Age, sex, and ethnicity also influence what a "healthy" range looks like. Use this calculator as a quick reference, then consult a healthcare professional for a complete picture. All data stays in your browser — nothing is stored or shared.