BMR Calculator
Calculate your Basal Metabolic Rate (BMR) to find out how many calories your body naturally burns at rest.
Used for the Mifflin-St Jeor physiological equation.
What is Basal Metabolic Rate (BMR)?
Your Basal Metabolic Rate (BMR) is the number of calories your body needs to accomplish its most basic (basal) life-sustaining functions. This includes breathing, circulation, nutrient processing, and cell production.
If you were to stay in bed all day and not move a single muscle, your BMR is the exact number of calories you would burn just staying alive.
The Mifflin-St Jeor Equation
This calculator uses the Mifflin-St Jeor equation, which is widely considered by health and nutrition professionals to be the most accurate method for estimating BMR.
- Men: BMR = (10 × weight in kg) + (6.25 × height in cm) - (5 × age in years) + 5
- Women: BMR = (10 × weight in kg) + (6.25 × height in cm) - (5 × age in years) - 161
How to Use Your BMR
Your BMR is the baseline. To figure out your total daily energy expenditure (TDEE) — how many calories you actually burn in a day when you include movement and exercise — you must multiply your BMR by an activity factor. Use our TDEE Calculator to take the next step in planning your diet for weight loss, maintenance, or muscle gain.
Related Tools
TDEE Calculator
Calculate your Total Daily Energy Expenditure (TDEE) and get custom macro goals for bulking, cutting, or maintenance.
Body Fat Calculator
Estimate your body fat percentage, lean body mass, and fat mass using the U.S. Navy Method.
Macro Calculator
Calculate your ideal macronutrient breakdown (Protein, Fats, Carbs) based on your chosen diet style.