Enter height, weight and optional age to calculate Body Mass Index online. The expanded calculator supports metric and imperial units, shows the adult BMI category, BMI Prime, approximate healthy weight range and a target weight based on the BMI value you choose.
Adult BMI categories are screening ranges for adults 20 years and older. Use the result for quick self-checks, progress tracking or preparing numbers for a consultation, but do not treat it as medical diagnosis or a replacement for professional advice.
✓Quickly estimate your Body Mass Index (BMI), BMI Prime and approximate weight category.
✓Use either metric units (kg, cm) or imperial units (lb, ft / in) — both options are supported.
✓The calculator shows your BMI value, weight category, target weight and approximate healthy weight range.
✓Use the tool to track progress, plan lifestyle changes and prepare data for discussion with a clinician.
✓All calculations run directly in your browser — no registration or software installation required.
✓BMI is an approximate indicator and cannot replace professional medical advice or diagnostics.
