Basal Metabolic Rate, usually abbreviated as BMR, shows how many calories a human body should get to maintain normal functioning of its vital organs in a state of complete rest, i.e. without considering physical activity. This figure plays an important role in composing a balanced diet since it determines minimum amount of energy that should be provided to a body for life support. This means that caloric value of a diet should not be lower than BMR specified for a person with the help of BMR Calculator. The calculation is based on the most accurate formula allowing to define BMR rather precisely for every person.