A body fat calculator using the Body Mass Index (BMI) method is an online tool that estimates the percentage of body fat using a person’s height and weight. For instance, a commonly used BMI calculator determines one’s BMI by dividing weight in kilograms by the square of height in meters, classifying them as underweight, normal, overweight, or obese based on the resulting value.
Such calculators are significant as they raise awareness about weight management and promote healthier lifestyles. Their origins can be traced to the development of the BMI formula by Adolphe Quetelet in the 19th century.