BMI Guide: Calculate Healthy Body Mass Index by Age and Gender

Body Mass Index (BMI) serves as a key indicator of cardiovascular health and general wellness. Learn how to calculate BMI for athletes, children, and amputees, and understand what your results mean.

What Are the Benefits of a Low BMI?

Published Jul,18 2017 | By Kendra Crawford

Body mass index, also called BMI, is a calculation of a correlation between a person’s height and weight that categorizes him or her as underweight, of normal weight, overweight or obese, assuming a normal body composition. Underweight is considered a BMI of 18.4 or lower.