Basal Metabolic Rate (BMR) Calculator

Calculate your BMR to determine your daily calorie needs at rest.

Calculator

Enter Your Information

Enter your weight in kilograms.

Enter your height in centimeters.

Enter your age in years.

Select your gender.

Table of Contents

1 BMR Formula
2 How to Calculate BMR
3 Factors Affecting BMR
4 BMR Limitations
Concept

BMR Formula

Basal Metabolic Rate (BMR) is the number of calories your body burns at rest to maintain basic life functions. The Mifflin-St Jeor Equation is used to calculate BMR.

Formula:
For men: BMR = (10 × weight) + (6.25 × height) - (5 × age) + 5
For women: BMR = (10 × weight) + (6.25 × height) - (5 × age) - 161
Steps

How to Calculate BMR

To calculate your BMR, follow these steps:

  1. 1
    Measure your weight in kilograms
  2. 2
    Measure your height in centimeters
  3. 3
    Note your age in years
  4. 4
    Apply the appropriate formula based on your gender
Factors

Factors Affecting BMR

Several factors can influence your BMR:

Body Composition

Muscle mass increases BMR, while fat mass decreases it.

Age

BMR typically decreases with age.

Gender

Men generally have higher BMR than women.

Hormones

Thyroid hormones and other endocrine factors affect BMR.

Important

BMR Limitations

While BMR is a useful measure, it has some limitations:

  • Does not account for individual variations in metabolism
  • May not be accurate for athletes or people with extreme body compositions
  • Does not consider environmental factors or lifestyle
  • Should be used as part of a comprehensive health assessment
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