What is BMR & How to Calculate this?
BMR Calculator: Full form of BMR is “Basal Metabolic Rate“; BMR is the amount of energy required by our body to perform essential tasks and functions. Basal metabolic rate (BMR) for any person is calculated on the basis of Age, Weight, Height and Gender. If you check online, you will find a number of tools used to calculate your BMR easily. BMR is calculated on the basis of the different formulas given by- Harris-Benedict Equation, Mifflin St Jeor equation and Katch–McArdle formula. So, we have developed a simple online tool to calculate your BMR; you need to enter your age, select the units (US or Metric), Enter weight and Height and you are done.
This tool will automatically Calculate BMR. People generally search for bmr calculator to lose weight in UK, Australia, Canada, US, India and more even worldwide. Use Our Fee tool and Calculate BMR to stay healthy.
BMR is calculated on the following formulas-
- Mifflin St Jeor equation and
- Harris-Benedict Equation,
- Katch–McArdle formula
Mifflin St Jeor Equation for BMR Calculator
Mifflin St Jeor Equation is the most widely used to calculate BMR (Basal Metabolic Rate). The following equations are for Metric Units (Weight in Kg and Height in cm).
- Mifflin St Jeor Eq. for Male- (10 × Weight in Kg)+(6.25 × Height in cm)-(5 × Age in Years) + 5
- Mifflin St Jeor Eq. for Female- (10 × Weight in Kg)+(6.25 × Height in cm)-(5 × Age in Years) – 161
Factors Affecting BMR– weight, Age, Sex, Genetics, Exercise, Body temperature, Environment temperature, Hormones and Pregnancy.
The following equations are for Imperial Units (Weight in Pounds and Height in Inches).
- Mifflin St Jeor Eq. for Male- (10 × Weight in Kg)+(6.25 × Height in cm)-(5 × Age in Years) + 5
- Mifflin St Jeor Eq. for Female- (10 × Weight in Kg)+(6.25 × Height in cm)-(5 × Age in Years) – 161
Harris-Benedict Equation for BMR Calculator
This is one of the popular/ notable formula published in 1919. Harris-Benedict Equation for Male and Female is given below. The following equations are for US Units (Weight in Pounds and Height in Inches).
- Harris-Benedict Equation for Male- (4.536 × weight in pounds) + (15.88 × height in inches) − (5 × age) + 5.
- Harris-Benedict Equation for Female- (4.536 × weight in pounds) + (15.88 × height in inches) − (5 × age) − 161.
Calculate TDEE (Total Daily Energy Expenditure)
TDEE is the total energy that a person requires in a day. Although, TDEE is very hard to measure accurately as it depends on MBR (Basal Metabolic Rate). Here is the way to calculate TDEE using BMR and exercise done per day–
| Physical Exercise / Activity Level | TDD Required (Based on BMR) |
| Little/ No exercise | BMR × 1.2 = TDEE required |
| Light exercise (1-3 days/ week) | BMR × 1.375 = TDEE required |
| Moderately Active (3-5 days/ week) | BMR × 1.55 = TDEE required |
| Very active (6-7 days/ week) | BMR × 1.725 = TDEE required |
| Extremely active (very heavy active & physical job/ training) | BMR × 1.9 = TDEE required |
BMR Variables (Basal Metabolic Rate)
There are various factors which affects BMR and metabolism-
- Age – As you getting older, your BMR generally slows and more energy is required by your muscles.
- Genetics – Sometimes genetic disorders may affect metabolism and m,ay results in faster BMR than others.
- Weather/ Temp. – Weather also affect BMR; Increase/ decrease in temperature may force your body to work harder to maintain its temperature and results in higher BMR.
- Diet/ Food – Food has a big influence on your BMR, What you Eat and When you Eat, matters a lot.
- Pregnancy – Pregnant women tends to eat more then usual; and their Harmon changes during pregnancy may increase/ decrease metabolism.
- Supplements/ Drugs – If a person uses Supplements or Drugs like- Caffeine and more, generally increase the BMR.
What is Rest Metabolic Rate (RMR)
Rest Metabolic Rate (RMR) is the amount of energy required by your body to function/ perform essential functions while at rest. In simple terms- calories your body burns while at rest. The essentials functions are– breathing, heart beating, circulating blood, basic brain functions, food digestion and sustaining the function of vital organs.
People Generally Search for following terms related to Calculate BMR– bmr calculator, basal metabolic rate, basal rate of metabolism, calculate basal metabolic rate, basal metabolic rate calculator, what is bmr, what is the bmr.
How do I calculate my BMR?
BMR can be calculated on the basis of Age, Height and Weight, One needs to enter these details and our online tool automatically calculates BMR for both male and female.
What is a good BMR for my age?
Most people’s BMR is between 1000 to 2000 and this means that- they need to take in between 1000 to 2000 calories/day to perform essential tasks and functions while in rest.
Which BMR method is best?
Out of the above discussed three methods- Mifflin St Jeor equation is considered as the most accurate and popular formula for BMR calculation.