Your age plays an important role in how BMI should be interpreted. Older adults may have a healthy BMI while carrying more visceral fat, and young adults can have identical BMI values with very different body compositions. This tool calculates your standard BMI and then provides age-specific context about what the number means for your demographic. It includes notes on how aging affects muscle mass, bone density, and fat distribution, all of which influence the clinical significance of your BMI value.
Calculator
Calculate your Body Mass Index and see exactly where you land on the healthy-weight scale.
Enter your height and weight
Your BMI and weight category will appear here instantly.
Body Mass Index (BMI) is calculated by dividing your weight in kilograms by the square of your height in meters (kg/m²). It provides a simple numeric measure of a person's thickness or thinness. While widely used by health organizations, BMI does not directly measure body fat percentage.