Every price in this piece starts with the Purchase to Plate National Average Prices from the USDA Economic Research Service. The 2017/2018 file reports a price per 100 edible grams for each food in USDA's dietary survey, built from retail scanner sales. That matters for a freezer-aisle ranking: in the 2017/18 file, 31 pizza codes carry a directly matched grocery price, and every restaurant, fast-food and school-lunch pizza row is imputed, simply borrowing a grocery price. We used only the directly matched rows. The 15 food codes are listed in the table below so anyone can rebuild the math.
Nutrition comes from the same survey's food database, FNDDS 2017-2018, matched by food code. One wrinkle is worth knowing if you ever try this yourself: on USDA FoodData Central, the survey file dated October 30, 2020 is the 2017-2018 edition, while the file dated March 31, 2020 is the older 2015-2016 edition. We matched 2017/18 prices to 2017-18 nutrition.
Prices were then lifted to today with the Consumer Price Index for frozen and freeze-dried prepared foods. That index averaged 167.363 across 2017 and 2018 and stood at 211.665 in August 2026, according to the Bureau of Labor Statistics series, a factor of 1.2647. Because one index lifts every style equally, it changes the dollar amounts but never the order.
The "slice" is FDA's own reference amount for pizza. Pizza sits in the mixed-dish row of the federal reference-amount table, next to burritos and sandwiches, at 140 grams. USDA weighs a frozen 11- to 13-inch pizza at 581 grams, so 140 grams is roughly a quarter of a medium pie, which is close to what many boxes call a serving.
The guardrail is one-third of the 2,300 mg sodium Daily Value set by the FDA, or 767 mg per 140-gram slice. Why not FDA's familiar 20% "high" line? Because every style in the aisle is already over it. The lowest-sodium pizza on the board carries 550 mg per slice, 24% of the Daily Value, so a 20% line would disqualify all 15 and tell nobody anything.
The ranking rule, stated before computing: protein per dollar decides the order; any style over 767 mg per slice ranks below every style under it; two styles within 0.1 gram per dollar count as a tie, broken by lower sodium.
These are national average relativities, not shelf tags. The newest Purchase to Plate prices describe 2017/18 sales, and ERS does not expect the next edition before spring 2027. The CPI adjustment brings the level forward; your store's sale price on any given Tuesday can still beat or miss these figures. The ranking is about how styles compare to each other.