BMR Calculator

Measurement Units

Weight (in kg)

Height (in cm)



Basal Metabolic Rate (BMR)

1,824 kcal/day

What is BMR and why is it important?

BMR (Basal Metabolic Rate) is the amount of energy your body requires to carry out its basic functions while at rest. This includes functions such as breathing, circulating blood, and maintaining body temperature. Knowing your BMR can help you determine how many calories you need to consume each day to maintain, lose, or gain weight.

How to Use the BMR Calculator Tool?

To use the BMR calculator tool, you need to input the following information:

  • Your age
  • Your gender
  • Your weight (in either kilograms or pounds)
  • Your height (in either centimeters or feet and inches)
  • Your level of physical activity (sedentary, lightly active, moderately active, very active, or extra active)
  • Once you have entered all of this information, the BMR calculator will provide you with an estimate of the number of calories you burn in a day while at rest.

Daily Calorie Need as Per BMR

Activity Level Daily Calorie Requirement
Sedentary Lifestyle: little or no exercise BMR * 1.2
Slighty Active Lifestlye: Exercise 1-3 times/week BMR * 1.375
Moderately Active Lifestyle: Exercise 4-5 times/week BMR * 1.55
Active Lifestyle: Daily exercise or intense exercise 3-4 times/week BMR * 1.725
Very Active Lifestyle: Intense exercise 6-7 times/week BMR * 1.9

Formula to Calculate BMR

The formula is based on the Harris–Benedict equations, revised by Mifflin and St Jeor in 1990. The Mifflin-St Jeor equation is now widely used to calculate BMR. Here are the formulas:

  • For Men:
    BMR = (10 × weight in kg) + (6.25 × height in cm) - (5 × age in years) + 5
  • For Women:
    BMR = (10 × weight in kg) + (6.25 × height in cm) - (5 × age in years) - 161

Factors Affecting BMR

Basal metabolic rate (BMR) can be influenced by various factors, including:

  • Body composition: Individuals with more muscle mass have a higher BMR because muscle requires more energy to maintain than fat.

  • Age: BMR typically decreases with age as muscle mass decreases and body fat increases.

  • Gender: Men generally have a higher BMR than women due to a higher proportion of muscle mass.

  • Hormones: Hormonal imbalances, such as hypothyroidism, can affect BMR.

  • Genetics: BMR can be influenced by genes, which can affect body composition and other factors.

  • Environmental factors: Factors such as temperature, stress, and altitude can affect BMR.

  • Diet: Caloric intake, nutrient intake, and meal frequency can affect BMR.

  • Exercise: Regular exercise can increase muscle mass and therefore increase BMR.

Benefits of Using the BMR Calculator Tool

  • Helping you to determine how many calories you need to eat in order to maintain, gain, or lose weight.
  • Providing a starting point for planning a diet and exercise program.
  • Helping to identify potential metabolic issues or conditions that may require medical attention.

Common Misconceptions About BMR Calculator

  • BMR is the same for everyone: In reality, BMR can vary widely depending on factors such as age, gender, weight, and height.

  • BMR is the same as metabolism: While BMR is a component of your overall metabolism, it does not account for all of the calories you burn in a day. Other factors such as physical activity and digestion also contribute to your overall metabolism.

  • BMR can be accurately measured through at-home tests or online calculators: While BMR calculators can provide a good estimate, there is some degree of error involved and the only way to truly measure BMR is through laboratory testing.

Frequently Asked Questions

How accurate is a BMR Calculator?

The accuracy of a BMR calculator depends on the formula used to calculate BMR, the accuracy of the input data (such as weight, height, age, and gender), and individual variations in metabolic rate. The most commonly used formula, the Mifflin-St. Jeor equation, has been shown to be more accurate than other formulas in most populations. However, keep in mind that a BMR calculator is only an estimate and may not be 100% accurate.

How often should I check my BMR?

There is no need to check your BMR regularly unless you are actively monitoring your weight and calorie intake. BMR is a relatively stable measurement that does not fluctuate significantly in the short term. However, you may want to recalculate your BMR if you experience significant weight changes or lifestyle changes that could affect your metabolic rate.

What measurement techniques are available in a BMI calculator?

A BMR calculator typically requires you to input your weight, height, age, and gender. Some calculators may also ask for your activity level or body composition, although these factors are not always necessary to calculate BMR.

Why is it important to track my BMR?

Tracking your BMR can help you determine how many calories you need to consume each day to maintain, lose, or gain weight. It can also help you understand the impact of lifestyle changes, such as changes in diet or exercise habits, on your metabolic rate.

Can the BMR Calculator Tool be used by anyone?

Tracking your body fat percentage can help you monitor changes in your body composition and identify potential health risks.

Can the Body Fat Calculator Tool be used by anyone?

The BMR calculator tool can be used by anyone who wants to estimate their basal metabolic rate. However, it is important to note that the calculator provides only an estimate and should not be used as a substitute for medical advice or professional nutrition counseling.

How to maintain healthy BMR?

Maintaining a healthy BMR involves several factors, including regular exercise, a balanced diet, adequate sleep, and stress management. Eating enough protein, staying hydrated, and avoiding crash diets can also help to maintain a healthy metabolic rate.

Is BMR the same as metabolism?

BMR is a component of metabolism, but it only represents the energy your body uses at rest. Metabolism, on the other hand, encompasses all of the energy your body uses, including digestion and physical activity.

How accurate are BMR calculators?

BMR calculators can provide a rough estimate of your BMR based on the input of your weight, height, age, and gender. However, they do not account for individual factors such as body composition and genetics, so the results may not be completely accurate.

What is the difference between BMR and RMR?

BMR and RMR (Resting Metabolic Rate) are often used interchangeably, but there is a slight difference. BMR refers to the energy your body uses while at complete rest, while RMR includes the energy your body uses while at rest but still awake and alert.

Is BMR the same for everyone?

BMR varies from person to person, as it is affected by factors such as age, gender, weight, height, body composition, and genetics.