39 Hilarious Pi Day Jokes To Spark Infinite Laughter

As a refresher: Pi is the ratio of a circle’s circumference to its diameter and it’s always 3.14. Since Pi is constant and never-ending (it’s been calculated to 50 trillion digits beyond the decimal point), it’s great for math jokes. On March 14 (Pi Day—get it, 3.14?), celebrate math, geometry, and any kind of pie you can think of (apple, peach, pumpkin, pizza) with these Pi Day jokes.

1. What do you get when you divide the circumference of a jack-o’-lantern by its diameter?

Pumpkin pi!

2. What’s the best way to serve pi?

A la mode. Anything else is mean.

3. Why should you never talk to Pi?

Because they will go on and on and on forever.

4. What do you get when you divide the circumference of the sun by its diameter?

Pi in the sky.

5. Why shouldn’t you let advanced math intimidate you?

It’s really as easy as pi!

6. A statistics professor and a math professor worked together on a cookbook.

They called it “Pi a la Mode.”

7. Why did Pi fail their driver’s test?

Because they didn’t know when to stop.

8. What do you get when you divide the circumference of green cheese by its diameter?

Moon pi.

9. What are 3.14% of sailors?

Pi-rates.

10. What’s wrong with the equation “pi r squared”?

Pi are round.

11. What did Pi say when asked to explain what Pi Day is again?

“I don’t want to repeat myself.”

12. Why should you never argue with Pi?

They are completely irrational.

13. What is a math teacher’s favorite snake?

A pi-thon.

14. What did the triangle say to the circle?

You’re pointless.

15. What’s the official animal of Pi Day?

The pi-thon!

16. What happens when you eat too much pi?

You get a bigger circumference.

17. What do you get when a bunch of sheep stand in a circle?

Shepherd’s pi.

18. Who was the roundest knight at King Arthur’s table? 

Sir Cumference because he ate too much pi.

19. What did the math teacher have for dessert?

Chocolate pi.

20. What do you call a mathematician who becomes a secret agent?

A s-pi.

21. What was Sir Isaac Newton’s favorite dessert?

Apple pi.

22. How did movie critics rate Life of Pi?

3.14 stars.

23. How are mathematicians like the air force?

They both use pi-lots.

24. Why don’t the other numbers take Pi to the party?

He goes on forever and ever.

25. What were the first mathematicians on the Oregon Trail called?

Pi-oneers.

26. Who do kids follow on March 14?

The Pi-ed Piper.

27. Why don’t you want to get hit in the face with pi?

It never ends.

28. How many bakers does it take to bake a pi?

3.14.

29. What do you get when you take a bovine and divide its circumference by its diameter?

A cow pi.

30. What do you call a mathematician who becomes a private investigator?

Magnum Pi.

31. What do mathematicians eat for dinner on March 14?

Chicken pot pi.

32. What is 1.57?

Half a pi.

33. Why don’t you get into an argument with pi?

It goes around in circles.

34. What do you call a young student who loves math and wants to know more about pi?

An as-pi-ring mathematician.

35. What did Pi say to their partner?

Stop being so irrational.

36. Why was the math book sad on Pi Day?

It had too many problems.

37. What did the mathematician call his girlfriend on March 14?

Sweetie pi.

38. What language should you use on Pi Day?

Sine language.

39. Why do people need to stop with the pi jokes?

We’ve heard them 3.14 million times already!

Share your favorite pi jokes in our We Are Teachers HELPLINE group on Facebook!

And for more laughs, check out our favorite math jokes, grammar jokes, and science jokes.