BMR Calculator, or
Basal Metabolic Rate Calculation

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Helps you to estimate your calorie needs by calculating your resting metabolic rate (metabolism) using standard or metric measurements.

This online BMR calculator (basal metabolic rate) will help you to calculate the total calories you would expend if you spent all day resting.

This is also referred to as your "metabolism."

As you get older your metabolism tends to slow down, making it increasingly difficult to maintain and lose weight.

Calculating your Basal Metabolic Rate at each age will help keep you abreast of where your activity level needs to be in order to lose or maintain weight (see Weight Calorie Tool for calculating caloric adjustments needed to achieve weight goals).

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So with that, let's use the BMR Calculator to calculate your metabolism.

Calculate Your BMR
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Instructions: Select your gender, choose Standard or Metric, enter your age, height and weight, then click the "Calculate BMR" button.

Mouse over the blue question marks for a further explanation of each entry field. More in-depth explanations can be found in the glossary of terms located beneath the BMR Calculator.

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Help Gender:
Help Measurement preference:
Help Your current age:
Help Your height in inches (ft. in.):
Help Your weight in pounds:
Your Basal Metabolic Rate:
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BMR Calculator Glossary of TermsCalcy magnifying glass

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Basal Metabolic Rate (BMR): Also referred to as Resting Metabolic Rate (RMR), is the energy (measured in calories) expended by your body completely at rest -- including no digestion occurring -- in order to maintain normal bodily functions. Of course your body burns more calories per day than just the resting rate. The actual amount of the total calories you burn per day depends on your daily activity level.

Calorie: The energy required to raise the temperature of 1 gram of water by 1 degree Celsius. The typical adult needs 1,000 to 1,400 calories per day just to fuel basic organs. An additional 400-600 calories are needed to go from laying still all day to moving around during the day. For every 3,500 calories you take in that are over and above the amount you need to maintain your weight, you will gain 1 pound.

Estimating Daily Calories Burned: Once you know your Basal Metabolic Rate you can use that figure to estimate the total number of calories you burn per day, based on the following chart (if you calculate your Basal Metabolic Rate above, the formulas below will be replaced by the computed calories).

Activity Level Activity Calories/Day
None little to zero exercise RMR x 1.2
Low low exercise or sports 1 to 3 days per week RMR x 1.375
Medium medium exercise or sports 3 to 5 days per week RMR x 1.55
High intense exercise/sports 6 to 7 days per week RMR x 1.725
Intense intense twice daily exercise, intense physical job RMR x 1.9

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