Before commencing a weight loss program, always consult your doctor. No guarantee of the accuracy of this tool or its suitability to all people is provided. This calculator is provided free of charge. The tool is not relevant to children or pregnant women. The equations applied here are general equations that generalize between people and as such may not be accurate in all cases. In 1984, Roza and Shizgal reevaluated Harris Benedict Equation and now you can choose between two options. This BMR calculator for women is based on Harris Benedict equation. Get started calculating your BMR (Basal Metabolic Rate) today with our online calculator. This calculator calculates some additional pieces of weight loss information such as your BMI and recommendations on the number of calories you should consume.Ī lot of the research for this calculator was based on the Wikipedia entries relating to Basal Metabolic Rate and the Harris Benedict Equation.ĭisclaimer: This tool is provided for informational purposes only. Our BMR calculator for females is intended only for women aged from 2 to 100 years. You might also like to take a look at our more general weight loss calculator. You exercise moderately (3-5 days per week) The activity levels and their factors are as follows: Activity Level These estimates are simply computed by multiplying your BMR by the factor specific to an activity level. The BMR calculator will then adjust your BMR by various factors to show estimates of the calories you burn a day based on your activity level. One of the useful properties of computing such an estimate of your BMR is that you can then use this to esitimate the calories you burn a day. The calculator will return an estimate of your BMR using both of these methods. Some studies have shown the equation by MD Miffin and ST St Jeor to be more accurate here, while the Harris Benedict equation was created in 1919 and has historical significance. Similarly to the above formula by MD Miffin and ST St Jeor, weight is in Kilograms, height is in centimeters and age is in years. s is a factor to adjust for gender and adopts the value +5 for males and -161 for females.Īs an alternative method of calculation, the Harris Benedict equations adopt separate equations for men and women as follows:īMR = (13.7516 x weight + 5.0033 x height – 6.755 x age + 66.473) kcal/dayīMR = (9.5634 x weight + 1.8496 x height – 4.6756 x age + 655.0955) kcal/day Here, weight is in Kilograms, height is in centimeters and age is in years. The equation introduced by MD Miffin and ST St Jeor is as follows:īMR = (9.99 x weight + 6.25 x height – 4.92 x age + s ) kcal/day Adjust your calorie intake for muscle building or fat loss. These equations allow an approximation of your BMR to be computed from the above data. This BMR calculator helps you work out how many calories your body need each day depending on your exercise level. There are various methods to calculate an estimate of your BMR and the calculator will return two estimates based on the formulas developed by MD Mifflin and ST St Jeor as well as the Harris-Benedict equation. You are basically looking at the calories you burn a day when at rest with no digestion occurring. “the amount of energy expended while at rest in a neutrally temperate environment, in the post-absorptive state (meaning that the digestive system is inactive, which requires about twelve hours of fasting in humans)” Your Basal Metabolic Rate is defined on Wikipedia as: The calculator will then calculate an estimate of your BMR and adjust you BMR by various factors to allow you to see an estimate of the calories you burn a day based on your level of activity. To use the calculator, simply input details about yourself such as you age, gender, weight and height. In our example, John needs to eat 2547 per day to maintain his weight.The BMR calculator allows you to calculate your Basal Metabolic Rate (BMR) as well as other information relating to the calories you burn a day. What about the physical activity level? As you could see in the table above, 'low active' value for a male equals 1.11. When we input the values above, we can solve the equation:ĮER (kcal/day) = 662 - (9.53 × 40) + PA * ĮER (kcal/day) = 662 - 381.2 + PA × Our tool will calculate John's estimated energy requirement as follows:ĮER = 662 - (9.53 × A) + PA * Our EER calculator has built-in weight and length converters that switches between SI and imperial units automatically. He describes his physical activity level as 'low active' as he has an office job, enjoys walking, and visits the gym from time to time.ĭon't worry if you prefer pounds and inches. He weighs 70 kilograms and is 172 cm tall. John is a 40-year-old male who wants to maintain his weight. To answer the question how to calculate EER, we will set up an example scenario.
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