Basal metabolic rate (BMR) is the rate of energy expenditure by humans at rest.
Men: BMR = 66 + ( 5 x height in cm ) + ( 13.7 x weight in kilos ) - ( 6.8 x age in years )
Women: BMR = 655 + ( 1.8 x height in cm ) + ( 9.6 x weight in kilos ) - ( 4.7 x age in years )