Supporting the life of a growing fetus is directly related to a higher BMR, which is why pregnant people often need to eat more than they did prior to pregnancy. Someone who uses certain drugs and supplements that act as stimulants, such as caffeine, can have a higher BMR than someone who doesn’t use these substances. It’s also important to note that eating too little over a prolonged period of time can reduce BMR significantly, as it triggers the body’s instinct to store more energy rather than utilize it because the body anticipates a limited availability of incoming energy. People who usually eat multiple small meals throughout the day tend to have a higher BMR than those who eat less frequent, larger meals. Muscle requires more energy for maintenance than fat, so people with higher percentages of muscle mass can have higher BMRs. The older you are, the lower your BMR tends to be. In fact, there’s a handful of variables that can affect the accuracy of a person’s BMR calculation, including: Outside of controlled laboratory conditions, BMR isn’t an exact science. Physical activity and nutritional factors like food digestion are responsible for the remainder of calories burned in a given day.
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Generally, energy represented by your BMR accounts for about 70% of your daily calorie burn, as it maintains the function of important organs including the heart, lungs, kidneys, liver, brain, skin and more. And by matching this energy output, you can expect to maintain your current weight. By consuming fewer calories than this daily energy output, you’re likely to lose weight. By consuming more calories than this energy output with your diet, you’re likely to gain weight over time. Once you know your BMR, you can also use predetermined activity multipliers, such as in our calorie calculator tool, to estimate the true number of calories you burn daily based on your baseline needs and usual amount of movement. By understanding how much your body burns at rest, you can determine how much of those energy needs are met by your daily diet and make adjustments to help you reach your specific health goals. Knowing your basal metabolic rate is most helpful if you’re focused on gaining weight, losing weight or maintaining your current weight. BMR Calculator: Calculate Your Basal Metabolic Rate While we work hard to provide accurate and up-to-date information that we think you will find relevant, Forbes Health does not and cannot guarantee that any information provided is complete and makes no representations or warranties in connection thereto, nor to the accuracy or applicability thereof. The compensation we receive from advertisers does not influence the recommendations or advice our editorial team provides in our articles or otherwise impact any of the editorial content on Forbes Health. Second, we also include links to advertisers’ offers in some of our articles these “affiliate links” may generate income for our site when you click on them. This site does not include all companies or products available within the market. The compensation we receive for those placements affects how and where advertisers’ offers appear on the site. First, we provide paid placements to advertisers to present their offers. This compensation comes from two main sources.
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To help support our reporting work, and to continue our ability to provide this content for free to our readers, we receive compensation from the companies that advertise on the Forbes Health site. 1918 December 4(12): 370–373.The Forbes Health editorial team is independent and objective. A Biometric Study of Human Basal Metabolism. The difference between the equations shown above and those on the Daily Caloric Expenditure Calculator is illustrative of the actual meaning of BMR. In the Daily Caloric Expenditure Calculator, BMR was multiplied by the "Activity Level Factor" to account for daily physical activity levels and the thermic effect of food (thereby providing an estimate of the total amount of calories you burn in a day), but these factors are not a consideration when determining BMR. The equations above are exactly the same as those used for our Daily Caloric Expenditure Calculator, except that the "Activity Level Factor" that is used for the Daily Caloric Expenditure Calculator has been removed here. This calculator is based on the widely used and accepted Harris-Benedict equations for BMR.
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