*It’s Pi Day, Pi Day, gotta get down on Pi Day . . .*

Even those of us who are not math nerds can celebrate March 14, also known as Pi Day.

Pi is a number unlike the ordinary numbers we see every day. It’s a small number, bigger than three but smaller than four. It’s a number that doesn’t have an end—if you started writing down pi, you would eventually run out of all the paper we have in the world and you still wouldn’t be able to write it all down.

We usually round pi to 3.14, and the digits that appear behind the 4 appear in a completely random, non-repeating order. It’s an irrational number, which means that it cannot be represented as a fraction.

Pi is also a number that invites puns, especially when it’s Pi Day. Maybe a non-pun joke or two sneaks in, if you’re lucky, but it’s mostly puns—and we collected twenty of them.

13.14% of sailors are pi-rates.

2Never talk to pi. He’ll go on forever.

3Come to the nerd side. We have pi.

4Simple as 3.141592…

5The roundest knight at King Arthur’s table was Sir Cumference. He ate too much pi.

6The worst thing about getting hit in the face with pi is that it never ends.

7What do you get when you take green cheese and divide its circumference by its diameter? Moon pi.

8What was Sir Isaac Newton’s favorite dessert? Apple pi.

9What is the official animal of Pi Day? The pi-thon.

10A pizza has a radius *z* and thickness *a*. Its volume is *pizza* (or pi*z*z*a)

11What is a math teacher’s favorite dessert? Pi!

12The mathematician says, “Pi r squared.” The baker replies, “No, pies are round. Cakes are square.”

13Just saw American Pi. I gave it a rating of 3.14.

14In Alaska, where temperatures get below freezing, pi is only 3.00. After all, everything shrinks in the cold.

15What do you get when you take the sun and divide its circumference by its diameter? Pi in the sky.

16How many pastry chefs does it take to make a pie? 3.14.

17What do you get when you cut a jack-o’-lantern by its diameter? Pumpkin pi.

18What is 1.57? Half a pie.

19What is the ideal number of pieces to cut a pie into? 3.14.

20How many calories are there in that slice of chocolate pi? Approximately 3.14.