The formula we use in our online tool is: BMR formula and calculating your Basal Metabolic Rate BMR values are usually only a bit lower than the resting metabolic rate (RMR), which is a similar metric, but with less strict conditions. Third, the measurement should take place in a room with controlled temperature at a body neutral level, that is between 22 and 26 degrees Celsius. Second, the measurement is taken after 30-60 min of resting or laying quietly. BMR is on average 5-10% lower for women than men of almost all age groups.įirst, no food is to be consumed and there must be no undue muscle exertion in the 12 hours preceding measurement. In laboratory conditions BMR is measured by the oxygen uptake under strict conditions, while in most cases it is estimated based on known predictors: age, height, weight, and gender. For your convenience our BMR calculator first shows you the BMR in Calories per day (kCal / day) so you can read it as the minimum energy your daily diet needs to provide.Ī definition found in the medical literature is that the basal metabolic rate is the minimum energy requirement to stay alive and awake. The unit for BMR in scientific / medical literature is usually kilocalories per square meter of body surface area (BSA) per hour: kCal BMR is used for calculating energy and nutritional needs for athletes and ordinary people alike, diets, threatment for some health conditions, weight loss diets, etc. Up to 85% of a person's daily energy expenditure goes towards sustaining the basic metabolic functions. Basal here is used in the sense of "minimal", so if something is basal it is of, relating to, or being essential for maintaining the fundamental vital activities of an organism, for example a basal diet is the absolute minimum nutrients your body needs to survive. Basal Metabolic Rate variation over timeīMR stands for Basal Metabolic Rate, although some incorrectly call it "base metabolic rate" or even "basic metabolic rate" - both of them are incorrect.BMR formula and calculating your Basal Metabolic Rate.You can use the below formula to find the required calories for gaining your weight. Required calories to achieve the target weight = calories to sustain weight - calories for losing weightįor a weight gain of 2.2 pounds or one kilogram in a week one will need 1100 calories. You can use the below formula to find the required calories for losing your weightĬalories for losing weight = (weight in kg - target weight in kg) * (1100 / goal date in weeks) When a person does rigorous exercises or sports or physical training (1.9), he or she is said to be in the Extra Activity Level.When a person does hard exercises or sports six to seven times per week (1.725), he or she is said to be in the Very Activity Level.When a person has a moderate amount of exercises or sports three to five times per week (1.55), he or she is said to be in the Moderately Activity Level.When a person has light exercise or light sports at least one to three times per week (1.375), he or she is said to be in the Slightly Activity Level.When a person has little to no exercise (1.2), he or she is said to be in the Sedentary Activity Level.The activity levels are classified into the below-mentioned levels: Finally, the first and second component are added to 655.1 and then the third component is subtracted from this addition to complete the equation.
The third component is achieved by multiplying the age in years by 4.676. The second component is achieved by multiplying height in centimeters by 1.85. The first component is got by multiplying the weight in kilograms by 9.563. The BMR in women utilizes three components. Finally, the first and second component are added to 66.47 and then the third component is subtracted from this addition to complete the equation.īMR = 655.1 + (9.563 * weight in kg) + (1.85 * height in cm) - (4.676 * age in years) The third component is achieved by multiplying the age in years by 6.755. The second component is achieved by multiplying height in centimeters by 5.003.
The first component is got by multiplying the weight in kilograms by 13.75. The BMR in men utilizes three components.
The BMR is achieved by applying the Harris Benedict Equation which is:īMR = 66.47 + (13.75 * weight in kg) + (5.003 * height in cm) - (6.755 * age in years) In order to know the weight loss by a target day, the below-mentioned formula is applied:Ĭalories to sustain weight = Basal Metabolic Rate * Activity Levelįor this, you need to know the Basal Metabolic Rate (BMR) and the Activity Level. How is Weight Loss achieved by Target Date?