BMI/BMR Calculator

Calculate your Basal Metabolic Rate and Body Mass Index

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Your BMI/BMR Calculator Results

Daily calorie needs based on activity level
Activity Level Calorie
Sedentary: little to no exercise
Exercise 1-3 times/week
Exercise 4-5 times/week
Daily exercise or intense exercise 3-4 times/week
Intense exercise 6-7 times/week
Very intense exercise daily, or physical job

Exercise: 15-30 minutes of elevated heart rate activity.

Intense exercise: 45-120 minutes of elevated heart rate activity.

Very intense exercise: 2+ hours of elevated heart rate activity.

The basal metabolic rate (BMR) is the amount of energy needed while resting in a temperate environment when the digestive system is inactive. It is the equivalent of figuring out how much gas an idle car consumes while parked. In such a state, energy will be used only to maintain vital organs, which include the heart, brain, kidneys, nervous system, intestines, liver, lungs, sex organs, muscles, and skin. For most people, upwards of ~70% of total energy (calories) burned each day is due to upkeep. Physical activity makes up ~20% of expenditure and ~10% is used for the digestion of food, also known as thermogenesis.

The BMR is measured under very restrictive circumstances while awake. An accurate BMR measurement requires that a person’s sympathetic nervous system is inactive, which means the person must be completely rested. Basal metabolism is usually the largest component of a person’s total caloric needs. The daily caloric need is the BMR value multiplied by a factor with a value between 1.2 and 1.9, depending on activity level.

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