BMR Calculator - Basal Metabolic Rate
Calculate your Basal Metabolic Rate (BMR) and daily calorie needs based on your activity level using the Mifflin-St Jeor equation.
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We use the Mifflin-St Jeor equation (most accurate).
This tool provides general health information and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.
What is BMR?
Your Basal Metabolic Rate (BMR) is the number of calories your body burns at complete rest to maintain basic life functions like breathing, circulation, and cell production. Even if you stayed in bed all day, your body would still burn these calories.
From BMR to TDEE
To know how much you should eat, you need to calculate your Total Daily Energy Expenditure (TDEE). TDEE is your BMR multiplied by an activity factor.
Sedentary
BMR x 1.2
Desk job, little to no exercise.
Moderately Active
BMR x 1.55
Moderate exercise 3-5 days/week.
Very Active
BMR x 1.725
Hard exercise 6-7 days/week.
The Mifflin-St Jeor Equation
We use the Mifflin-St Jeor equation, which is considered one of the most accurate formulas for calculating BMR.
Men: (10 × weight in kg) + (6.25 × height in cm) - (5 × age in years) + 5
Women: (10 × weight in kg) + (6.25 × height in cm) - (5 × age in years) - 161
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