For those who have an accurate estimate of their body fat percentage, the Katch-McArdle formula may provide a more accurate estimate of BMR. The calculator on this page uses the Mifflin St Jeor equation. How is BMR estimated?īMR is estimated using several different equations. to maintain weight, consume the same number of calories as your BMR.Įveryone's circumstances are different however, and while the above works in theory, it may not work for everyone.to gain weight, consume more calories than your BMR.to lose weight, consume fewer calories than your BMR.The equation used by this calculator to estimate BMR is the Mifflin St Jeor Equation (discussed below).īMR is commonly used as a way to measure the number of calories you need to consume per day in order to lose weight, gain weight, or maintain your weight. A significant amount of research has been done surrounding estimating BMR, and a number of different equations have been developed for this purpose, such as the Mifflin St Jeor Equation, the Harris-Benedict Equation, and the Katch-McArdle formula. BMR and REE are often used interchangeably, because while their definitions differ, they can be used to estimate each other.īecause BMR requires strict conditions to properly measure, such as being awake but completely at rest, it is usually estimated instead. This is also a good estimate of your resting energy expenditure (REE), which is the amount of energy you burn over time while at rest. Your basal metabolic rate (BMR) is the amount of energy that your body requires in order to perform these base functions. To use the calculator, please provide your age, weight, height, activity level, and click the "Calculate" button.Įven while at rest, your body still expends energy to perform functions such as breathing, circulating blood, processing nutrients, producing cells, and more. This calculator is intended for adults between the ages of 18 and 80 years old. This BMR calculator estimates the Basal Metabolic Rate (BMR) of a person based on age, sex, body weight, and body height.
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