BMR Calculator

Calculate your basal metabolic rate thanks to this BMR calculator and find out how many calories you need to stay healthy.

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What is the basal metabolic rate?

The basal metabolic rate is the minimum value of energy you need for one cell in your body to survive, in other words, the quantity of energy one person needs in a resting state. It is the necessary energy for your vital organs to function involuntarily so that your body maintains a constant and adequate temperature.

How to measure the basal metabolic rate?

BMR measures your metabolism by giving a number that expressed the daily total of energy (kcal) that you need in a resting state for your body to function.

The basal metabolic rate, or BMR, is in charge of maintaining bodily temperatures, the heartbeat, liver function, the kidneys…

What is BMR used for?

This calculation is essential to find out the calories you need to maintain your weight and choose the best diet for you, whether that is a weight-loss diet or a balanced diet.

How do you calculate BMR?

To calculate the basal metabolic rate you need to use this calculator. Your BMR will take into account the following:

  • Age: as you get older, your metabolism slows down
  • Sex: men usually have a higher BMR than women
  • Weight: the more you weigh, the more energy needed to function
  • Size: bigger people will have bigger organs that count as greater muscle mass that will vary the BMR
  • Health: health will affect the BMR, as a fever will require unexpected energy upkeep, as will stress, pregnancy and certain medications.

To use this calculator, simply enter your details for sex, weight (kg or lb), height, age and daily activity levels.

Formula for BMR

The calculation for BMR is done with two formulas, one for women and one for men:

MenBMR = (10 x weight in kg) + (6.25 x height in cm) – (5 x age in years) + 5
WomenBMR = (10 x weight in kg) + (6.25 x height in cm) – (5x age in years) – 161

If you then apply the daily levels of activity to this formula, the way to calculate your BMR will change according to the following:

Little to no exerciseDaily necessary calories = BMR x 1.2
Light exercise (1-3 days a week)Daily necessary calories = BMR x 1.375
Moderate exercise (3-5 days a week)Daily necessary calories = BMR x 1.55
Frequent exercise (6-7 days a week)Daily necessary calories = BMR x 1.725
Regular exercise (twice a day, hard workouts)Daily necessary calories = BMR x 1.9