Your BMR will be based on your height, weight, age, and gender. Since it is not possible for the majority of people to do indirect caloremitry, a number of equations have been created to try to provide the best estimate of basal metabolic rate. However, there are limitations to indirect calorimetry, such as cost and accessibility, that make it not possible for most people to do. These labs measure the heat coming off of your body to determine the number of calories that it burns at rest. The only way to determine your true BMR would be to go to a lab and have your metabolic rate measured by gas analysis through either direct or indirect calorimetry. This represents the energy, or calories, that your body requires to function when completely at rest and includes all of your normal bodily functions, such as your respiration, your heart rate, blood flow, and brain activity.īasically, all of the vital functions that keep you alive!Įveryone will have a different BMR since this is dependent on your height, weight, age, and gender. Jeor BMR for a 32-year-old woman weighing 70kg at a height of 180cm.Your basal metabolic rate (BMR) is your resting metabolism. Jeor Basal EquationīMR = (10 x weight in kilograms) + (6.25 x height in centimeters) – (5 x age in years) + 5īMR = (10 x weight in kilograms) + (6.25 x height in centimeters) – (5 x age in years) – 161Įxample of Mifflin-St. Basal metabolic rate is the amount of energy expended per day at rest (how many calories you would burn on bed rest). Jeor Formula (or equation) calculates your basal metabolic rate (BMR), the results are based on an estimated average. The BMR refers to the amount of energy (in calories) your body burns if you were lying down all day, with no activity. These equations are based on the metric system so use kilograms for your weight and centimeters for your height.Įxample of Harris-Benedict BMR for a 45-year-old woman weighing 70kg at a height of 180cm.Ħ55.1 + (9.563 x 70) + (1.85 x 180) – (4.676 x 45) = 1,447.09 BMR To calculate the BMR, simply follow the equations. It was later published by the Carnegie Institution of Washington in the publication, “A Biometric Study of Basal Metabolism in Man.” Harris-Benedict EquationīMR = 66.47 + (13.75 x weight in kilograms) + (5.003 x height in centimeters) – (6.755 x age in years)īMR = 655.1 + (9.563 x weight in kilograms) + (1.85 x height in centimeters) – (4.676 x age in years) This equation came as a result of a study performed by James Arthur Harris and Francis Gano Benedict. This formula has been used since 1919 and delivers an estimate of how much energy your body needs to stay alive. Harris-Benedict Basal Metabolic Rate Formula There are two main methods for calculating the basal metabolic rate, Harris-Benedict, and Mifflin St Jeor. So, if you have more muscle than fat, then your BMR will be higher than someone with more body fat. The amount of calories a person burns to fuel basic bodily functions is their basal metabolic rate (BMR) and varies by the individual.īMR can vary depending on certain factors, including the following factorsįor example, muscle burns more calories at rest than fat. The power source for your body is calories. Even when you are asleep, your body burns energy. We all need the energy to fuel our bodily functions like heartbeat, breathing, nervous system communication, digestion, the endocrine system, and more. This is calculated using a formula and is based on certain physical characteristics that are unique to your body. Inch Calculator What is the Basal Metabolic Rate?īasal Metabolic Rate (BMR) is the amount of energy your body needs to carry out the most basic functions in a resting state.
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