A Body Type Calculator is a tool that estimates a person's body type based on their measurements and proportions. The calculator typically asks for measurements such as height, weight, waist, hips, and shoulders, and uses this information to determine whether the person's body type falls into one of several categories, such as endomorph, mesomorph, or ectomorph.

Endomorphs tend to have a rounder, softer body shape with higher body fat percentages. Mesomorphs have a more muscular, athletic build, with moderate body fat. Ectomorphs are generally lean and thin, with low body fat and a smaller frame.

Body Type Calculators can be useful for people who want to understand their body shape and composition, as well as to help guide fitness and nutrition choices. However, it's important to keep in mind that body type is just one factor in overall health and fitness, and that other factors such as lifestyle habits, genetics, and medical history also play important roles.