BMR Calculator

BMR x Calories/Day




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Basal Metabolic Rate

Weight loss and calories are intrinsically related. Both are directly proportional; you lose calories, you lose weight. It is as simple as that! If you are under the notion that calories are something that our body burns when we are doing exercise, or household chores, walking, trekking, sports or other activities, then you should know about BMR.

What is BMR?

Basal Metabolic Rate, commonly abbreviated as BMR, is that amount of energy your body spends in its resting state. It means when you are sleeping or when you are not doing any other work — how many calories are being utilized by your body.

You must be wondering that if the body is not doing anything, how calories would be burnt at all? And even if calorie burning takes place, would that calorie count to be that significant?

Amazing Human Metabolism

As the name goes BMR is ‘Basal’, which means it is essential. We all know that a human body is a 24 x 7 running machine that performs countless activities right from the cellular level. These functions include:

  • Heart beating and blood circulation
  • Your inhale and exhale rates
  • Body trying to maintain normal body temperature
  • And you would be amazed to know that just the calories burnt by these primary metabolic activities comprise 70% of the total calories consumed by a normal human.

Weight Loss and BMR

The put it simply, the more BMR, the effect is the weight loss. Also, people who have more muscle mass tend to have quick weight loss because their BMR rates are higher. This is because keeps spending calories more during the rest state too.

Why do you need to calculate your BMR?

BMR was a concept that found its origin to estimate the functionality of thyroid glands in humans. These results were then compared with the metabolic rate of animals.As medical sciences advanced, BMR has been assuming critical importance to understand a patient’s medical history and monitor changes in weight and height with age. Understand that habits such as drinking, smoking and not exercising will impact a person’s BMR.

Even modern researches are focusing on BMR as a key to devise new techniques of treatment to diseases such as diabetes. Most governments too are creating awareness among its citizens about maintaining a healthy BMR to lead a happy and healthy life.

What are the factors that affect BMR?

Various factors affect the BMR of an individual:
  • Gender: Men possess higher BMR than women because their muscle ratio is higher than the latter.
  • Age: For every ten years of increase in age, BMR keeps dropping by 2%. This phenomenon starts from the age 20!
  • Body Surface Area: Higher the body surface, greater is the amount expended for basic functionalities, hence more BMR.
  • Genes: Scientists discovered that a good BMR is mostly genetically acquired.
  • Diet: If you are planning to cut down calories for weight loss, it will adversely affect your BMR. Drastic and unmonitored restriction in intake of calories will bring down BMR by as low as 30%.
  • Studies prove that regular strength training boosts your BMR by 15%. So, focus on gaining muscle!

  • Exercise: By exercising, you are invigorating your body’s lean tissue. It means you are increasing your BMR, which is a good sign.
  • Medications: Some medications are proven to have serious adverse effects on BMR. Talk to your doctor if you are under long-term medication and are concerned about your BMR.
  • Other Factors: Weight, hormone and glands activity, room or ambiance temperature, and your body temperature, all these play a significant role in influencing your BMR.

Standard Formula for Measuring BMR

A standard formula for measuring BMR is shown below:

BMR for Females= 655 + (4.35 × weight in pounds) + (4.7 × height in inches) - (4.7 × age in years)

BMR for Males = 66 + (6.23 × weight in pounds) + (12.7 × height in inches) - (6.8 × age in years)

How to use our BMR calculator?

With our BMR calculator, you BMR calculations are made easy! Just input your age, weight, gender, and height. You can choose your desired units, either lbs or kgs for convenience. Just submit all the required information and click Calculate. Presto! You get your BMR on the screen! Additionally, you can check out our Age Calculator if you are confused about calculating your age accurately.


Understand that BMR varies from person to person and with your genes and lifestyle. This online BMR calculator is never meant to be a substitute for a professional medical care provider’s advice.

If you are suffering from serious health concerns or want to know exactly how many calories your body burns as a BMR, please consult a doctor in person. This online calculator is very generic and for educational purposes only.

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