![]() W= weight in kilograms, H= height in centimetres, A= age in years The Mifflin-St Jeor and Harris-Benedict equations remain the two most commonly used BMR equations with most calorie calculators. The Mifflin-St Jeor Equation also calculates BMR and has prove more accurate a lot of the time than the revised Harris-Benedict Equation. It was revised in 1984 to be more accurate and was used up until 1990, when the Mifflin-St Jeor Equation was introduced. The Harris-Benedict Equation is one of the main ones used to calculate basal metabolic rate (BMR) and was one of earliest equations written for this purpose. Though actual amounts will vary according to person, with far too many variables to take into account for any calculator to be 100% accurate all the time, a simple calorie calculator will be able to put you in the right ballpark.Ĭalorie Calculators will be based on one of several equations, all of which will give you an estimated average daily caloric expenditure. It’s easy enough to find a pretty decent estimate of your BMR. Knowing exactly how much food to eat to achieve any deficit, surplus, or even maintenance, requires knowing how much energy your body uses which, as we have just seen, is your BMR. Weight loss requires a caloric deficit and weight gain requires a caloric surplus. You can find out more about BMR on our BMR Calculator ![]() Once you know your BMR, any changes you want to bring about in your body become suddenly much more achievable. ![]()
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