National Pi Day 2025: List of Pizza and Pie Deals at Papa John’s, Burger King, DoorDash and More

March 14 is also known as National Pi Day—a celebration of the mathematical constant π (pi). For many, it has become a day to enjoy discounts on pizza, pies and other circular foods.

Restaurants and retailers nationwide are offering special deals to mark the occasion. Here’s a look at some of the best deals available for Pi Day 2025.

Why It Matters

Pi Day has evolved from a niche celebration for math enthusiasts to a widely recognized event that businesses use to attract customers with themed promotions. The day offers an opportunity for restaurants, especially pizzerias and bakeries, to engage with customers while providing discounted and free treats.

When Was Pi Day Invented?

Pi Day was first officially recognized in 1988 by physicist Larry Shaw at the San Francisco Exploratorium.

Shaw and his colleagues celebrated by marching in a circle and consuming fruit pies. The event gained popularity over the years, and in 2009, the U.S. House of Representatives passed a resolution recognizing March 14 as National Pi Day. Today, it is celebrated at schools and science organizations, in addition to food-related promotions.

List of Pi Day Food Deals and Freebies

Here’s a breakdown of some of the top food deals available on March 14:

• Papa John’s: Rewards members can buy a large or extra-large pizza and get a second one free for $3.14 at participating locations.
• Blaze Pizza: Customers can buy one 11-inch pizza and get a second one for just $3.14. Additionally, Blaze Pizza is providing a promo code in its app for another buy-one-get-one deal, redeemable through the end of March.
• 7-Eleven: Members of 7Rewards and Speedy Rewards can purchase a whole pizza for $3.14 at participating locations or via the 7NOW app.
• Burger King: Royal Perks members can get a free Hershey Pie on March 14 when they spend $3.14 or more.
• Pizza Hut: This year on Pi Day, the pizza chain giant is launching its “Pizza Charcuterie” for purchase. For $24.99, foodies get two medium pizzas, eight boneless chicken wings and a selection of breadsticks with dips.
• DoorDash and Pizza Hut: The food ordering app is partnering with Pizza Hut this year. Those who order from participating Pizza Hut locations on DoorDash on March 14 will get $6 off an eligible order of $30 or more. DoorDash is also offering additional discounts for Sbarro ($7 off orders of $25 and over) and Hungry Howie’s Pizza (free Howie Bread with a $30 order) at participating locations.
• Perkins Restaurant & Bakery: On Pi Day, guests who purchase any entrée can receive a free slice of pie by presenting a digital coupon available on the restaurant’s website.
• CiCi’s Pizza: Customers who buy one medium or large one-topping pizza can purchase a second pizza for $3.14. This offer is available for both in-store and online orders using the promo code “PIDAY.”
• California Pizza Kitchen: CPK Rewards members can buy an Original BBQ Chicken, Pepperoni, or Traditional Cheese pizza for $3.14 with any $25 purchase. This offer is available for dine-in, takeout, or delivery.
• Anthony’s Coal Fired Pizza & Wings: The restaurant is offering 31.4 percent off a large 16-inch pizza for dine-in customers on March 14.
• BJ’s Restaurant & Brewhouse: Buy any full-size “Pizookie” and get a second one for $3.14.

How Many Digits Are in Pi?

Pi is an irrational number, meaning its decimal representation goes on infinitely without repeating.

As of 2021, researchers have calculated pi to over 62.8 trillion digits. While most calculations only require a few decimal places, mathematicians and computer scientists continue to push the boundaries of its known digits for research and computational purposes.