How is Calorie Budget calculated?

MyNetDiary uses the official formulas for Estimated Energy Requirements provided by the Food and Nutrition Board of the Institute of Medicine of the National Academies.

Adult man: EER = 662 - 9.53 x age (y) + PA x (15.91 x wt [kg] + 539.6 x ht [m])

Adult woman: EER = 354 - 6.91 x age (y) + PA x (9.36 x wt [kg] + 726 x ht [m])

The formulas are explained in "Energy" chapter of DRI book.

PA indicates activity level, and is equal to 1.0 for sedentary, 1.12 for low active, 1.27 for active, and 1.45 for very active. See more details about MyNetDiary activity levels.

We recommend selecting activity level in MyNetDiary as "sedentary" and accurately accounting for any extra energy-burning activities and exercises that are outside of typical "sedentary" lifestyle. This will be much more accurate than the generic "active" activity level, which is of course a very rough guess. You can adjust your activity level in the Plan section.

Once MyNetDiary calculates your body energy requirements, it subtracts from it the daily "deficit" calories to match your weekly weight loss rate. If you plan to lose 1 lb/week, you need to lose 3,500 calories per week, which is 500 calories per day. In this example, the Calorie Budget calculated by subtracting 500 calories from daily energy requirements.

MyNetDiary does not consider body fat percentage or BMI for calculating Calorie Budget, as the formulas above are more accurate. You may want to look if your BMI is in a healthy range when you decide what your desired target weight is.


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