BMR Calculator

BMR Calculator helps you to determine your Basal Metabolic Rate or the number of calories needed based on your daily activity level.

BMR  =  
Daily Calorie Needs:
Activity Level Calorie
Sedentary (little or no exercise):
Light exercise (1-3 days/week):
Moderate exercise/sports (3-5 days/week):
Intense exercise/sports (6-7 days/week):
Very hard exercise daily, or physical job:

About BMR Calculator

Welcome to our BMR Calculator. It's a free online tool where you can easily calculate your Basal Metabolic Rate. In other words, it estimates how many calories your body required per day depending on your daily activity schedule. Also, it works on three different formulas with accurate results.

BMR Calculator

BMR Formulas

Note: In the following formulas, we will take Weight in "kg" and Height in "cm".

Mifflin-St Jeor:

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

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

Harris-Benedict Equation (Revised):

Male:    BMR = (13.397 × Weight) + (4.799 × Height) - (5.677 × Age) + 88.362

Female:    BMR = (9.247 × Weight) + (3.098 × Height) - (4.330 × Age) + 447.593


Here, we only need Body Fat and Weight values to calculate BMR.

BMR = 370 + (21.6 × ((1 - Body Fat(%) / 100) × Weight))

How to use BMR Calculator?

  1. Firstly, choose the Unit system in between "US/UK" and "Metric".
  2. Now select your age and gender using the dropdown options.
  3. Enter your height and weight in the appropriate fields. If you choose "US/UK Units", then it will ask for your height in feet and inches and weight in pounds. Whereas "Metric Unit" asks for height in centimeters and weight in kilograms.
  4. After that, select the BMR formula for what you want to calculate the Basal Metabolic Rate.
  5. There are three formulas included in the calculator. Mifflin-St Jeor, Harris-Benedict (Revised), and Katch-McArdle. The first one (Mifflin-St Jeor) is the most recommended and used.
  6. If you choose Katch-McArdle, it will ask you to enter your Body Fat in percentage.
  7. Lastly, just press the "Calculate" button to see the final result on your screen.
  8. As a result, it gives the BMR(Calories/day) and total daily calorie needs based on the activity level.