BMR Calculator


Use this BMR calculator to determine your basal metabolic resting rate. There are several variables that are used in the BMR calculation.

These include age, gender, weight and height. These factors are used to determine your resting BMR.

This calculator will tell you the number of calories per day you should consume to maintain your existing weight based on the resting BMR.

You can use either the metric or US measurements for this online tool.

BMR Calculator

Age in Years
Activity Level

Your BMR is:

Your Avg Daily Calories Need Is:

Activity Level Guide

Sedentary = Little or no exercise

Somewhat Active = Light exercise 1 - 3 days a week

Moderately Active = Moderate exercise or sports 3 - 5 days a week

Very Active = Hard exercise or sports 6 - 7 days a week

Extremely Active = Hard daily exercise or sports plus physical job or exercise two times a day

How to use the BMR Calculator

Just select your gender and then plug in your weight and height information. Be sure to select the correct measurement for each (pounds or kg for weight and inches or cm for height).

You will be presented with the calories per day based on the input information. To determine what your daily calorie intake should be in order to start losing weight, you will need to know and understand your basal metabolic rate.

BMR is the amount of calories you would burn while at rest like sleeping. Even while at rest, your body burns calories. It uses these calories for functions like breathing, blood circulation and maintaining body temperature just name a few.

Your BMR is responsible for burning sixty to seventy percent of the total calories you will burn in a day. Understanding this is the first step in creating a calorie defict for losing weight.

Results of the BMR Calculator

So why two results? Well the BMR result is your resting rate. Basically this means the amount of calories you burn while inactive, like sleeping.

Even though you are not active, your body is. In order to breath, digest, pump blood and maintain body temperature, you need energy. This energy is the calories that are burned during these bodily functions.

The second result is the amount of calories you need in order to maintain your current weight based on your activity level. The more active you are the more calories you will require.

This is because you are already burning the calories you need in order to sustain life. So if you add activity to this, you need to increase the amount of calories you consume to maintain your weight.

If you are trying to lose weight, then you need to reduce your calories. You can do this by consuming (eating) fewer calories or increasing your activity to burn more calories...or a combination of both.

If you reduce the calories you eat, or increase the calories you burn by 500 each day, this would approximate to 1 pound loss for the week. At 1000 calorie reduction, this would be 2 pounds per week of weight loss.

Experts recommend that you try to lose 1 - 2 pounds a week and no more. Studies have shown that a quicker weight loss often leads to additional weight gain once the diet is done.

So in order to keep the weight off, you want to lose it slowly. This will help you develop lasting lifestyle changes that will help ensure the weight stays off.

If you are curious about the math behind this BMR calculator, then read this page on the BMR calculation.

Additional Calculators

Here are more free online calculators on this site. In addition to these online tools, check out the weight loss tools page for some offline spreadsheets you can download to help you lose weight.

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The Body Mass Index calculator will help you determine if you have a potential health risk due to your current weight.

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Are you a member? Then use these calculators to find the value in the foods you eat.

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With any weight loss plan, adding exercise can help you reach your goals sooner. So use these tips to get started with your workout routines.

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