How this calculator works
This calculator estimates Body Mass Index from weight and height and shows the standard adult category. Enter weight and height in metric or imperial units to see the BMI value and category. Use it for health screening, weight management planning, and understanding BMI categories. The key inputs are weight and height. The output is the BMI value and the corresponding category. Real-world applications include health screening, fitness tracking, doctor conversations, and wellness planning. The calculator uses the metric adult BMI formula: weight in kilograms divided by height in meters squared. BMI is a screening measure based on height and weight. It does not measure body fat directly or diagnose health. Muscle mass, frame size, and other factors can affect the interpretation. Children and teens should use age- and sex-specific BMI percentiles.