Quick BMI Calculator is easy to use application that is used as a screening tool to identify potential weight problems in adults. Use this calculator for adults, 20 years old and older. Enter your weight and height using standard or metric measures. Body mass index (BMI) is the most widely used diagnostic indicator to identify a person's optimal weight depending on his height. Your BMI "number" will inform you if you are underweight, of normal weight, overweight, or obese. A high BMI can be an indicator of high body fatness. Also it can be used to screen for weight categories that may lead to health problems. Find your BMI and what it means with Quick BMI Calculator.