Prime Progression
BMR Calculator
Basal Metabolic Rate — the calories your body burns at complete rest using the Mifflin-St Jeor equation.
BMR is what your body burns at complete rest. Mifflin-St Jeor equation. For total daily calories, use the TDEE calculator.
Let AI track your nutrition and suggest targets based on your BMR.
Get Prime ProgressionFrequently asked questions about BMR
What is BMR?
Basal Metabolic Rate is the number of calories your body needs to maintain basic life-sustaining functions like breathing, circulation, and cell production while at complete rest. It typically accounts for 60-75% of your total daily calorie burn.
What's the difference between BMR and TDEE?
BMR measures calories burned at rest, while TDEE (Total Daily Energy Expenditure) includes all activity on top of your BMR. TDEE is the number you actually need for meal planning. Calculate your TDEE here.
Which BMR equation is most accurate?
The Mifflin-St Jeor equation is considered the most accurate for most people and is recommended by the Academy of Nutrition and Dietetics. It tends to predict within 10% of measured values for non-obese individuals.