Calculating calorie intake by BMI is a method used to determine the optimal daily calorie consumption for an individual based on their body mass index (BMI), a measure of body fat based on height and weight.
This approach is significant in managing weight and overall health. It helps ensure that calorie intake aligns with energy expenditure, aiding in weight loss, maintenance, or gain as desired. The concept of using BMI to calculate calorie needs originated in the early 20th century with the development of the Quetelet Index, the predecessor to modern BMI.