In other words, your BMR is the number of calories you would burn if you spent all day in bed, not moving. One calorie is the amount of energy needed to increase the temperature of 1 gram of water by 1 degree Celsius, and your basal metabolic rate refers to the amount of energy needed to carry out its most basic functions, like digesting food and keeping your organs functioning. Don’t want to? Stick to Mifflin St Jeor.Ĭalories are energy and your body is a machine that burns them. Katch-McArdle is likely the best formula, but only if you’re being accurate with your numbers - and that means making an appointment to get a DEXA scan to truly measure your body fat. Where ℓ is a person’s lean body mass, or their total weight minus their body fat percentage. (“I’ve got a four-pack, not quite a six-pack, so I’m probably 14 percent.”) Most people who claim to are estimating their body fat based on a self assessment. But the “katch” is that you need to know your body fat percentage, and almost nobody does. This formula, sometimes called the Cunningham formula, is more accurate. This is the formula we use in the calculator above if you don’t know your body fat percentage. Where s is +5 for males and −161 for females.Īs you can see, it takes into account a person’s weight, height, and age. Mifflin St JeorĬonsidered just a little more accurate than the other big BMR formula (which is called Harris Benedict), the Mifflin St Jeor formula is what we used to ascertain your BMR if you don’t know your body fat percentage.( 1) It looks like this: There are a few popular formulas out there and the two we landed on are considered the most accurate. Very intense exercise: 2+ hours of elevated heart rate activity. Intense exercise: 45-120 minutes of elevated heart rate activity. Very intense exercise daily, or physical jobĮxercise: 15-30 minutes of elevated heart rate activity. Speak with your physician if you have any concerns.ĭaily calorie needs based on activity level Activity Levelĭaily exercise or intense exercise 3-4 times/week The opinions and articles on this site are not intended for use as diagnosis, prevention, and/or treatment of health problems. The answer is individual and the number below is just an estimate, a place to start - no one can claim their calculator does anything more - but this is the best calculator to help you get there.Įditor’s note: The content on BarBend is meant to be informative in nature, but it shouldn’t take the place of advice and/or supervision from a medical professional. Once you know your basal metabolic rate, or your BMR, you can figure out how many calories you should be eating to accomplish your goal, be it muscle gain or fat loss. Our goal here is to help you figure out what that number is. The body burns a certain number of calories every day and if you eat over that number you gain weight, if you eat under that number you lose weight. There’s no shortage of self-proclaimed gurus who swear that this pill or that herb is the secret to easy weight loss, but here’s the cold, hard truth: only calories dictate how much you weigh, and a BMR calculator will help you gain muscle and lose fat.

Bmr calculator to gain muscle