BMR Calculator

Calculate your Basal Metabolic Rate (BMR) using multiple formulas including Mifflin-St Jeor, Harris-Benedict, and more. Get accurate TDEE calculations for weight management.

BMR Calculator

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BMR = 1730 calories/day
Your TDEE is:
Activity Level Calorie
Sedentary2076
Lightly Active2379
Moderately Active2682
Very Active2984
Extremely Active3287
Loss Weight: eating fewer calories than you burn.
Gain Weight: eating more calories than you burn.
Details about Activity Levels:
Activity Level TDEE Description
SedentaryBMR * 1.2Little to no exercise + work a desk job
Lightly ActiveBMR * 1.375Light exercise 1-3 days / week
Moderately ActiveBMR * 1.55Moderate exercise 3-5 days / week
Very ActiveBMR * 1.725Heavy exercise 6-7 days / week
Extremely ActiveBMR * 1.9Athletes and people who do very heavy physical labor
Examples of Physical Activities and Their Corresponding Activity Levels:
Activity Activity Level
Sitting or lying downSedentary
WalkingLightly Active
RunningModerately Active
SwimmingModerately Active
BikingModerately Active
JoggingVery Active
Weight liftingVery Active
High-intensity interval training (HIIT)Very Active
Professional athletesExtremely Active

What is Basal Metabolic Rate (BMR)?

Basal metabolic rate (BMR) is the minimum number of calories your body needs to function at rest. This includes the energy your body uses to maintain basic functions such as breathing, circulation, cell production, and nutrient processing.

BMR is influenced by a number of factors, including:

  • Age: BMR tends to decrease with age.
  • Gender: Men typically have a higher BMR than women.
  • Muscle mass: Muscle tissue burns more calories than fat tissue, so people with more muscle mass tend to have a higher BMR.
  • Body composition: BMR is calculated based on lean body mass, so people with a higher percentage of lean body mass tend to have a higher BMR.
  • Activity level: BMR is also influenced by activity level. People who are more active tend to have a higher BMR than people who are less active.

What is TDEE?

TDEE stands for Total Daily Energy Expenditure. It's the total number of calories that your body burns in a day when accounting for all activities—everything from digesting food to breathing and walking, to any exercise or physical work you do. TDEE is an important metric for anyone looking to lose weight, gain weight, or maintain their current weight because it provides a calorie target to aim for.

Methods to calculate BMR

Mifflin-St Jeor

The Mifflin-St Jeor Equation is considered by many researchers to be one of the most accurate methods for estimating BMR. It was developed in 1990 and is said to be more accurate than the older Harris-Benedict Equation.

Harris-Benedict

The Harris-Benedict Equation was one of the earliest equations used to estimate BMR. It takes into account weight, height, age, and sex.

Revised Harris-Benedict

Due to inaccuracies found in the original Harris-Benedict equation, it was revised in 1984 to better match modern lifestyles.

Schofield

The Schofield Equation is based on meta-analyses of BMR studies from various countries. It provides different formulas for different age groups.

Katch-McArdle

The Katch-McArdle Formula is unique in that it takes into account lean body mass (LBM), making it potentially more accurate for individuals who are highly muscular and those who are significantly leaner than the average population.