The Devine formula is a mathematical equation used to estimate an individual's ideal body weight based on their height and gender. It provides a simple way to assess whether a person is within a healthy weight range. The formula varies slightly for men and women, taking into account different body compositions. To calculate ideal body weight using the Devine formula, you start with a base weight for a height of 5 feet, then add or subtract a specific number of pounds for each additional or missing inch. This method is often used in health and fitness assessments to guide weight management.