Basal metabolism is generally measured by basal metabolic rate, and the common formula is (pulse rate + pulse pressure) – 111 (pulse pressure is calculated in mmHg). Basal metabolism is an energy metabolism in which the body is in a basal state. The basal metabolic rate is the minimum amount of energy that needs to be consumed to maintain life. The generalized formula for basal metabolic rate is (pulse rate + pulse pressure) – 111 (pulse pressure is calculated in mmHg) after 12 hours of fasting and 8 hours of sleep and lying still on an empty stomach in the early morning. The normal range of basal metabolic rate is -10% to +10% (or +15%). It is recommended to seek medical attention if abnormal values of basal metabolic rate occur.