BMR Calculator
This Basal Metabolic Rate (BMR) calculator can be used to estimate your basal metabolic rate—the amount of energy expended while at rest in a neutrally temperate environment, in the post-absorptive state (meaning that the digestive system is inactive, which requires about twelve hours of fasting in humans). This calculator is based on the Mifflin - St Jeor equation.
| height | feet | inchs |
| weight | pounds |
| height | centimeters | |
| weight | kilograms |
Reference
Basal metabolic rate (BMR) is the amount of energy needed while rest in an appropriate temperate and in the post-absorptive state (meaning an inactive digestive system). In such state, the energy will be used only to maintain the vital organs, which include the heart, lungs, kidneys, the nervous system, intestine, liver, lungs, sex organs, muscles, and skin. BMR decreases with age and increases with muscle mass.
BMR is measured under very restrictive circumstances while awake. An accurate BMR measurement requires the inactiveness of a person's sympathetic nervous, which requires complete rest. Basal metabolism is usually the largest component of the total caloric needs of a person. The real daily calorie needs is the BMR value multiplied by a factor with a value between 1.2 and 1.9, depending on the activity level.
In most of the situations, the BMR is estimated with equations summarized from statistical data. The most commonly used one is the Mifflin and St Jeor equation:
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BMR = 10 * weight(kg) + 6.25 * height(cm) - 5 * age(y) + 5 (man)
BMR = 10 * weight(kg) + 6.25 * height(cm) - 5 * age(y) - 161 (woman)
This calculator is based on the Mifflin and St Jeor equation.