BMR Calculator
Basal Metabolic Rate (BMR) is the amount of energy your body needs to keep vital functions running while at complete rest in a comfortable environment.
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Read MoreBMR reflects calories burned for essential bodily functions such as heart beating, breathing, brain activity, and maintaining body temperature. For most people, BMR accounts for about 70% of daily energy expenditure, with physical activity and digestion accounting for the rest.
Measuring BMR requires strict conditions, like being awake but at complete physical and mental rest. Because direct measurement can be inconvenient, BMR is often estimated through formulas.
Popular formulas include the Mifflin-St Jeor Equation, Revised Harris-Benedict Equation, and Katch-McArdle Formula. The Mifflin-St Jeor tends to be most accurate, while Katch-McArdle considers lean body mass, making it useful for lean individuals.
BMR is influenced by factors like age, muscle mass, genetics, climate, diet, pregnancy, and supplements such as caffeine.
Resting Metabolic Rate (RMR) is similar but measured under less strict conditions. BMR and RMR values typically differ by about 10%.
While BMR calculations provide useful estimates for caloric needs, individual variations mean tracking lifestyle and progress is key for personalized health or fitness goals.