March 14 is Pi Day, the annual celebration of the mathematical constant 3.14, and this year the food industry is taking the occasion seriously. Pizza chains, fast-food brands, and dessert shops have lined up a range of deals, many priced at exactly $3.14, for customers looking to mark the date with something other than a calculator.
What Pi Day actually is
Pi Day has been observed on March 14 since 1988, when physicist Larry Shaw started celebrations at the Exploratorium science museum in San Francisco. Congress formally designated the date a national holiday in 2009, partly to encourage interest in math and science. The date also happens to be Albert Einstein’s birthday.
The number pi represents the ratio of a circle’s circumference to its diameter. It begins at 3.14 and continues infinitely, with no repeating pattern. Using just nine digits, scientists can calculate the circumference of the Earth with a margin of error of roughly a quarter of an inch per 25,000 miles. NASA relies on it daily for calculating orbits, spacecraft communication, and planetary positioning.
Pi Day pizza deals worth knowing
Blaze Pizza is running one of the more straightforward offers: buy one 11-inch pizza and get a second of equal or lesser value for $3.14 at participating locations. The deal is in-store only and limited to one per person on any original dough pizza.
Marco’s Pizza is offering a medium one-topping pizza for $3.14 for a limited time at participating locations, making it one of the lowest-priced options of the day.
7-Eleven is stretching its celebration across two days. On March 13 and 14, members of its 7Rewards and Speedy Rewards loyalty programs can get a whole pizza for $3.14. Cinnamon sugar fried pies are available for 31.4 cents, and $1 snack pies are also on offer at participating stores.
Anthony’s Coal Fired Pizza is offering a large 10-inch coal-fired cheese pizza for $3.14 with the purchase of any beverage, valid for dine-in only until 4 p.m.
Fresh Brothers is letting customers order a personal pizza, either a Pure Pepperoni Pizza or a Cheese Pizza on original crust, for $3.14 when ordering online using the code PIDAY on March 14.
Sheetz is selling cheese or pepperoni pizza flatz for $3.14 through March 20, with the offer available through the chain’s app and limited to one use per customer.
Wiseguy Pizza has New York-style cheese and pepperoni slices available for $3.14 in-store and online using the code PIDAY2026.
Pi Day dessert pie deals
Burger King is giving away a free Hershey’s Sundae Pie or Cinnamon Apple Pie with any purchase of $3.14 or more, all day on March 14 for Royal Perks members.
Big Boy is offering $3.14 slices of pie all day at participating locations, with options across classic fruit and cream varieties. The dine-in deal runs while supplies last.
Polly’s Pies, a Southern California chain with 12 locations, is giving dine-in guests a free slice of pie with any entrée purchase. Members of the Polly’s Perks loyalty program can claim a free slice with no purchase required.
BJ’s Restaurant and Brewhouse is offering a full-size classic Pizookie for $3.14 with the purchase of a large or shareable pizza, valid for dine-in only on March 14.
Milk Bar locations are serving a Pi à la Mode deal: a slice of Milk Bar Pie alongside a cup of Cereal Milk Soft Serve for $10, a $4 discount off the regular price. An additional 10% off all pies is available through the brand’s online store.
A few more Pi Day offers
DoorDash is featuring Pi Day deals from Pizza Hut, Sbarro, and Blaze Pizza for delivery customers. At Pizza Hut, customers can buy one medium or large Create Your Own pizza and get one free at participating locations while supplies last.
Instacart users can receive a free Red Baron pizza with their order at select stores on March 14, while supplies last.
Gopuff is discounting select frozen pie products by 25% on Pi Day, including Edwards Frozen Hershey’s Chocolate Cream Pie Slices and Edwards Frozen Key Lime Pie Slices.
Most deals are available for one day only and tied to specific apps, loyalty programs, or in-store purchases. Availability varies by location.
