Basal Metabolic Rate

Calculate your Basal Metabolic Rate (BMR) thanks to our calculator so that you will know the calories you need in order to gain, lose or maintain your weight.








Level of Activity

Sedentary: little or no exercise
Light activity (1-3 days a week)
Moderate activity (3-5 days a week)
Intense Activity (6-7 days a week)
Very intense daily activity, or physical work

Metabolic Rate


Calories to maintain weight


Calories to lose weight


Calories to gain weight


What is basal metabolism?

Basal metabolism is the amount of energy (measured in calories) the body uses to maintain basic functions such as breathing, blood circulation, and organ function while at rest. It is also known as the basal metabolic rate (BMR) and is influenced by factors such as age, sex, weight, and muscle mass.

How is basal metabolism measured?

Measuring BMR can provide insight into an individual's overall energy needs, and can be useful for weight management, athletic performance, and medical diagnosis.

There are several methods to measure BMR, including direct calorimetry, indirect calorimetry, predictive equations, and bioelectrical impedance analysis. This calculator uses predictive equations to calculate your BMR.

It's important to keep in mind that BMR is just one factor that influences overall energy balance and weight management, and it's not a definitive measure of health, fitness, or general well-being.

Why it is important to know our basal metabolic rate?

This calculation is essential to know the minimum calories your body needs on a daily basis. So, if we have an approximation of how many calories our resting body needs, we know that if we eat more than we need, we will be in a caloric surplus and therefore we will gain weight. If we are in a deficit, we will lose weight. If we are even, we will maintain our weight.

How is the BMR calculated?

To calculate your basal metabolic rate you can use our basal metabolic rate calculator. The basal metabolism takes into account the following factors:

  • Age: As we get older, metabolism slows down.
  • Sex: Men tend to have a higher BMR than women.
  • Weight: The more we weigh, the more energy we need to move.
  • Body composition: larger people have larger organs and more muscle mass, which would cause BMR to vary.
  • State of health: Being sick can affect BMR, since, for example, a fever requires an unexpected expenditure of energy. Stress, pregnancy, and medications can also affect this value.

To use the calculator you only have to include your gender, weight (in kg), your height (in cm) and age, and the level of daily activity.