How Are Serving Sizes Decided on Food Labels?
By FDA regulation, not manufacturer choice. Serving sizes on the Nutrition Facts panel come from FDA's Reference Amounts Customarily Consumed (RACC) tables under 21 CFR 101.12 — standardized per food category, based on nationwide consumption-survey data. A separate per-container rule requires a second Nutrition Facts column on packages that hold 200–300% of one RACC serving, specifically to stop single-sitting packages from under-reporting calories and sugar.
The one thing to know: Serving sizes on the Nutrition Facts panel are not chosen by the manufacturer to flatter the numbers — they are set by FDA's Reference Amounts Customarily Consumed (RACC) tables under 21 CFR 101.12, based on food-consumption survey data for each product category. A package containing 200–300% of a single RACC serving must be labeled with dual columns ("per serving" and "per package") specifically because FDA found consumers were misreading calorie/sugar totals on single-serving-sized packages meant to be finished in one sitting.
What RACC actually is
Reference Amounts Customarily Consumed are FDA-established standard serving sizes assigned per food category (e.g., a defined RACC for "carbonated beverages," another for "yogurt," another for "cookies") derived from consumption survey data, primarily USDA's large-scale food consumption surveys. Manufacturers must label their product's serving size using the applicable RACC — they don't get to invent a smaller or larger figure to make a nutrient count look better.
The per-container dual-column rule
A package that holds between 200% and 300% of a single RACC serving — think a 20-ounce soda bottle or a slightly-oversized snack bag meant to be finished in one sitting — must show both a "per serving" and a "per container" Nutrition Facts column under 21 CFR 101.9(b). FDA added this specifically because research showed people were reading only the smaller "per serving" numbers on packages they actually ate in one go, undercounting calories and sugar in the process.
What manufacturers CAN still influence
While the RACC-based serving size itself is fixed by category, package size and design remain manufacturer choices — a company can still choose to sell a package that lands just under the 200% dual-column threshold, or design a wrapper that visually de-emphasizes the "servings per container" line. The regulation constrains the serving-size number; it doesn't control how a shopper reads the label at a glance.
This page is a label-and-regulation reference, not a dietary or portion recommendation.
Frequently Asked Questions
FDA does, not the manufacturer. Serving sizes are set from Reference Amounts Customarily Consumed (RACC) tables under 21 CFR 101.12, built from nationwide food-consumption survey data for each food category — manufacturers must use the applicable RACC regardless of their own package size.
Not legally for the base serving-size figure — that's fixed by category under the RACC tables. What a company DOES control is package size, and small packages containing 200-300% of one RACC serving trigger a separate rule requiring a second 'per container' column so shoppers aren't misled.
Under 21 CFR 101.9(b), a package containing 200-300% of a single RACC serving size must display both a 'per serving' and a 'per container' Nutrition Facts column, because FDA found that consumers were under-counting calories and sugar on packages plausibly consumed in one sitting.
It should follow the RACC-based math, but package sizes and the number of "servings per container" a label states are meant to reflect the RACC serving size divided into that package — it isn't a marketing choice, though rounding and package-size design can still affect how the numbers read at a glance.
No. RACC reflects what FDA data shows people customarily consume per eating occasion for that food category — it's a statistical basis for standardized labeling comparisons, not a dietary recommendation for how much of that food you personally should eat.