BMR Calculator

Calculate Basal Metabolic Rate (BMR)

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About This Calculator

The BMR Calculator calculates your Basal Metabolic Rate (BMR) using the Mifflin-St Jeor Equation. BMR is the number of calories your body burns at rest to maintain basic functions like breathing, circulation, and cell production.

How It Works

  • 1

    Enter your age in years.

  • 2

    Select your gender (male or female).

  • 3

    Input your weight in kilograms.

  • 4

    Enter your height in centimeters.

  • 5

    The calculator computes your BMR in calories per day.

Formula Explanation

BMR (Male) = 10 × Weight(kg) + 6.25 × Height(cm) - 5 × Age + 5

The Mifflin-St Jeor Equation for men calculates BMR based on weight, height, and age.

BMR (Female) = 10 × Weight(kg) + 6.25 × Height(cm) - 5 × Age - 161

The Mifflin-St Jeor Equation for women accounts for typically lower metabolic rates.

Tips

  • BMR represents calories burned at complete rest - your minimum energy needs.

  • BMR accounts for 60-75% of total daily calorie expenditure.

  • Muscle mass increases BMR, while age and sedentary lifestyle decrease it.

  • Use BMR as a baseline for calculating total daily calorie needs with activity.

Frequently Asked Questions

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