Published on July 05, 2026 • Last updated July 05, 2026
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Basal Metabolic Rate (BMR) represents the minimum number of calories your body needs to function at rest (e.g. breathing, circulation, cell production, temperature regulation). BMR is estimated using the Mifflin-St Jeor equation, which is widely considered the most accurate standard for calorie planning.
BMR is the energy your body expends at absolute rest. Total Daily Energy Expenditure (TDEE) accounts for BMR plus physical activity levels. TDEE = BMR × Activity Multiplier.
Yes, BMR generally declines with age as muscle mass decreases and metabolic efficiency slows down.
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