A body fat percentage calculator is an online tool that helps users estimate the proportion of body fat relative to total body weight. For instance, if a user weighs 150 pounds and has a body fat percentage of 25%, their body fat mass is 37.5 pounds.
Calculating body fat percentage is essential for managing weight, tracking fitness progress, and assessing overall health. Historically, body fat was determined through underwater weighing or caliper measurements. Now, online calculators use measurements like age, height, weight, and gender to derive precise results.