Introduction: Given the complexity and costs involved in measuring body fat percentage in humans, there is a quest to establish new methods for determining this variable. The CUN-BAE equation utilizes simple indicators such as sex and Body Mass Index (BMI) to estimate body fat percentage. The objective was to determine the degree of correlation between the percentage of body fat obtained through the CUN-BAE equation, BMI, and waist circumference (WC) in Chilean adults from the interviewed sample of the National Health Survey (CNHS) 2016-2017.