The Basal Metabolic Rate (BMR) calculator calculates the minimum number of calories a person needs to burn to sustain their basic life functions during a 24-hour period of rest. These functions include:
BMR is also a way in which you can measure your metabolism at complete rest.
Understanding your BMR will form the foundation of your daily calorie needs and allow you to tailor your nutrition and fitness to help you reach your goals.
Once you have your BMR, you can then understand your Total Daily Energy Expenditure (TDEE), this will depend on your physical activity levels and from there you can adjust your daily calorie intake depending on your goals.