A quick tangent the Atwater factors

So what in the holy hell, you ask, are the Atwater factors. They are the values I suspect most dieters are already familiar, representing the caloric value of the different nutrients. You'll be using them below to calculate caloric intakes from the various nutrients which is why I'm presenting them here. They appear in table 2 below.

Table 2:

Atwater factors


Calorie value


4 calories/gram


4 calories/gram


9 calories/gram


7 calories/gram


1.5-2 calories/gram *

* Note that contrary to popular/past belief, the human body does derive a small amount of calories from fiber. Unless fiber intakes are massive, this simply isn't worth worrying about and I'm going to ignore it from here on out. I'm just including it for completeness.

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