National Pi Day is today, March 14, and celebrates the mathematical constant Pi, which is approximately 3.14 -- the ratio of a circle's circumference to its diameter. But perhaps just as importantly, this math-friendly holiday is another reason to snack on pie and pizza all day.
Many pizza and pie companies participate in this holiday by offering discounts and freebies on some of their menu items. Note that you must make a purchase to receive any of the freebies listed below.
Here are the best deals you can get for National Pi Day.
Pi Day pizza deals
Looking for pizza pie deals? Start here.
New and existing Blaze Pizza rewards members can get any 11-inch pizza for $3.14 on Pi Day.
If you order Mod Pizza through DoorDash on March 14 and spend $3.14, you'll get a free pizza.
Round Table Pizza
Round Table Pizza reward members (new and existing) can get a personal cheese pizza for $3.14 on National Pi Day. The price is usually around $7.
If you sign up forrewards at any time, you'll receive a free NY XL pizza slice with the purchase of a drink. Plus, you'll get a surprise on your birthday.
will be offering up large pizzas for $3.14 on March 14 to its rewards members.
Pi Day pie deals
Fun fact: Cherry pie is the most popular pie in the US, according to Instacart, followed by pumpkin pie and apple pie. Here's where you can find pie deals.
On March 14, you can get a free chicken pot pie from Boston Market with a purchase of a pot pie and a drink. Also, if you join its rewards program, you'll get a free individual meal with a $10 purchase.
Carnation is giving away baking kits to 10 winners that include Carnation evaporated milk, a grocery card for other ingredients and step-by-step instructions to make a cow pie.
is giving new subscribers $15 off their first $50 order using code GetInMyBELLY.
Grand Traverse Pie Company
Grand Traverse Pie Company is offering customers a free slice of its Michigan ABC Crumb Pie with any purchase on National Pi Day.
Marie Callender's is giving away a free slice of pie with any adult entree purchase for National Pie Day.
Other Pi Day deals
Not a pizza or pie fan? Check out this waffle deal.
starting March 14. You'll need to follow the Kellogg's Eggo social media accounts on Instagram, Twitter and Facebook and watch for an announcement. The first 100,000 people to click the link in the post will win.