BMR Calculator

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About BMR Calculator

What is BMR?

Some professionals use the words basal metabolic rate (BMR) and resting metabolic rate interchangeably (RMR). These two phrases have a lot in common. However, it is important to recognise that the definitions of BMR and RMR differ somewhat in important ways. Your body burns calories while at rest, as determined by your RMR. After a complete night of sound sleep and before you eat or exercise, this rate is often checked in the morning. RMR and BMR are nearly identical, as you can see. You should be able to calculate your basal metabolic rate using your resting metabolic rate. Some weight loss and fitness gurus use the terms interchangeably since they have comparable meanings. However, the phrase "resting metabolic rate" is more prevalent.

BMR Calculator

Why it is important to know your BMR?

Understanding your basal metabolic rate (BMR) provides a starting point for figuring out how many calories you would want to consume based on your goals and the expected baseline number of calories your body requires to function. You can use your BMR to aid with weight gain, loss, or maintenance. You can determine how many calories to consume by understanding how much you burn. In a nutshell: Is keeping your weight stable your goal? Eat calories that are equal to those you expend. Do you intend to put on weight? Don't consume as many calories as you do. Is weight loss your main priority? Eat fewer calories per day than you expend.

How to calculate your BMR?

Analyzing the amount of oxygen and carbon dioxide a person breathes in and out is necessary for BMR estimates. This analysis is known as "calorimetry" among experts. It is a technique for determining how many calories a person's body is utilising. BMR also considers a person's sex, age, height, and weight. Because the test must be conducted in a strictly regulated environment with exacting testing requirements, BMR is rarely used outside of clinical settings. Therefore, it is doubtful that a person could determine their BMR accurately at home. People can attempt estimating their RMR as a less complicated option. This method is significantly less constrained but will still roughly calculate how many calories a person's body burns while at rest.

Harris-Benedict BMR equation

  • Men: (88.4 + 13.4 x weight) + (4.8 x height) – (5.68 x age)
  • Women: (447.6 + 9.25 x weight) + (3.10 x height) – (4.33 x age)

Mifflin-St Jeor equation

  • Male: 9.99 x weight + 6.25 x height – 4.92 x age + 5
  • Female: 9.99 x weight + 6.25 x height – 4.92 x age – 161


How to use BMR for weight loss?

Remember that your BMR only takes into account the calories your body burns while at rest; it does not take into account the calories you need to move around, speak, exercise, etc. You must include your present activity level or your increased activity level if you intend to exercise more when calculating your calorie needs for a meal plan. Convert your BMR to your total daily energy expenditure to do that (TDEE). Theoretically, you can lose weight by eating anything less than your TDEE; it simply depends on how quickly you want to see results. Many sources would advise you to cut 500 calories per day from your diet in order to lose one pound of fat every week. This is predicated on the idea that one pound of fat equals 3,500 calories, and that if you cut your calorie consumption by 500 over the course of seven days, you'll lose 3,500 calories each week, or one pound of fat. You may be familiar with this regulation. Hard-and-fast "rules" like these are problematic because, despite the fact that they are frequently supported by facts (caloric restriction causes fat loss), they may not be suitable or secure for everyone. While someone with a TDEE of 1,400 will likely experience substantial challenges leading a regular life and exercising while ingesting 900 calories per day for any period of time, someone with a TDEE of 2,600 may need to make adjustments to decrease to 2,100. The best way to manage a caloric reduction is to gradually decrease your intake over a few days by a little amount—200 or 300 calories, for example. Have your body composition assessed after a week to make sure you aren't losing lean body mass. You can determine how much your fat mass has decreased and change your caloric requirements accordingly if you do.

How to use BMR for bodybuilding?

If you want to gain lean body mass, you must consume more calories each day than you require while also doing strength training. By multiplying your BMR by the factor that most accurately reflects the volume of physical activity you engage in each week, you can convert your BMR to TDEE. For consistency's sake, we'll utilise the previous example's activity factor (x1.55) and daily calorie intake (1679 Cal) to generate a TDEE of 2,602.45. To have enough energy to achieve the required effects, this calorie threshold must be exceeded. The TDEE, or total daily energy expenditure, states that you must consume roughly 15% more calories each day than are needed to maintain your current weight. Therefore, in this case, the person should aim to raise their daily calorie intake to roughly 2992.3 calories, which may be conveniently rounded up to 3,000 calories. There comes a time when consuming more protein won't result in a discernible gain in lean mass, so think twice before adding additional protein to your diet. In a 2006 study of collegiate athletes, protein intake above.9 g of protein per pound of body weight had no positive effects on muscle or strength gains. Protein is crucial, but calories may perhaps be more vital. If you want to add lean body mass, you must consume more calories than you need each day, but it is not a free-for-all. Making deliberate decisions is crucial, much like when attempting to cut calories. Your BMR and lean body mass are closely correlated, so any alterations will have an impact on how many calories you burn.