Serving Size Calculator

Number of Servings is calculated purely from Total Amount divided by Serving Size -- both weight-based figures printed on the nutrition label. Calories Per Serving and Price only come into play afterward, when Total Calories and Cost Per Serving use that servings figure to compute their own totals, so neither of them feeds back into how many servings the package contains.

Calories Per Gram divides Calories Per Serving by Serving Size, producing a calorie-density figure that stays constant regardless of how the manufacturer chose to define a serving. This makes it useful for comparing two products with very different serving sizes -- a snack with a small serving size but low Calories Per Gram can still be less calorie-dense overall than one with a larger serving that packs more calories per gram.

Cost Per Serving divides Price by Number of Servings, and Number of Servings itself depends on Total Amount divided by Serving Size. Two packages priced identically can still have very different Cost Per Serving figures if one contains more total weight, or if the manufacturer defines a smaller serving size -- either change increases Number of Servings and lowers Cost Per Serving for the same sticker price.

No, not if Serving Size and Calories Per Serving stay the same. Doubling Total Amount doubles Number of Servings, and doubling Price alongside it means the ratio Price / Number of Servings -- which is exactly how Cost Per Serving is calculated -- stays unchanged. This matches buying a larger package at a proportionally higher price with the same per-serving definition.

No -- it simply takes whatever Serving Size and Calories Per Serving figures you enter from the nutrition label and does the arithmetic from there. It doesn't independently verify that the label's serving size matches FDA reference amounts customarily consumed (RACC) or any other regulatory standard; it's a calculator for the numbers already printed on your specific package, not a label-compliance checker.