60 Pi Puns That Are Infinitely Funny

Pi is the only number that makes me hungry. That’s not even a joke, every March 14th I end up buying an actual pie because my brain can’t separate the two concepts anymore. I’ve been making pi puns since high school, which means I’ve had roughly 3.14 lifetimes to perfect them (and roughly 2.9 of those lifetimes were wasted). Here are way too many.

1. The Classic You Already Know

What do you get when you divide a pumpkin’s circumference by its diameter? Pumpkin pi.

Yeah, I know. Everyone’s heard it. But it’s the load-bearing wall of pi humor and I’m not gonna demolish it.

2. The Snake One

What do you call a snake that’s 3.14 meters long? A pi-thon.

This one I’m genuinely proud of even though I didn’t invent it. It’s clean, it’s tight, it works on paper AND out loud. The perfect pi pun, honestly. I’ve sent it to at least four people who didn’t respond.

3.

My math teacher told me I needed more pi in my diet. I brought a cherry pie to class. Got an A. (This didn’t happen but it should have.)

4. Rapid-Fire Round

• Pi was going to throw a party, but it realized it could never bring things full circle.
• Pi’s favorite movie? Life of Pi. Obviously.
• Pi’s second favorite movie? The Pi-rate of the Caribbean.

That last one is a stretch. I don’t care.

5.

What did pi say to its therapist? “I feel so irrational.”

6. One For The Group Chat

Living my best life at 3.14 📐🥧

(That’s an Instagram caption. You’re welcome. Use it on March 14th and tag nobody.)

7.

Why should you never argue with pi? Because it’ll just go on forever.

8. Actually Proud of This One

I asked pi for its opinion and it gave me an infinite number of points, none of which ever repeated. So basically, pi is Twitter.

9.

Pi had a rough breakup. It just couldn’t commit to anything finite.

10.

What’s a mathematician’s favorite season? Pi-ne season. Wait, no. That doesn’t work. Let me try again.

What’s a mathematician’s favorite type of tree? A pi-ne. Okay that barely works either but we’re moving on.

11.

“I told my friend I memorized 100 digits of pi.”
“She said, ‘Get a life.'”
“I said, ‘I can’t. It’s irrational.'”

12. The Bakery Pun

I opened a bakery called “3.14159 Desserts.” Nobody can ever finish saying the name.

13.

Pi walks into a bar. The bartender says, “We don’t serve your kind here.” Pi says, “That’s odd, I’m not even rational.”

I know the irrational joke has appeared twice now. Pi puns have like four lanes and “irrational” is the highway. Bear with me.

14.

Come for the math. Stay for the pi. 🥧

15. A Genuinely Nerdy One

Why did the mathematician break up with Euler’s number? Because they found pi more transcendental.

If you know, you know. Both pi and e are transcendental numbers, meaning they’re not roots of any non-zero polynomial with rational coefficients. This is the kind of thing I think about at 2 AM. I’m doing fine.

16.

What do you call a religious pi? A pi-ous number.

17.

Why was pi so bad at football? It could never find the end zone. (Because it doesn’t end. Get it? Yeah, you get it.)

18. The Magnum Opus

So there’s this ancient problem called “squaring the circle”, basically, using only a compass and straightedge, can you construct a square with the same area as a given circle? In 1882, Lindemann proved it was impossible because pi is transcendental. Which means, mathematically speaking, you literally cannot square things with pi.

Pi is never going to be a square. It’s too well-rounded.

I’ve been sitting on that one for MONTHS. Months. Please appreciate it.

19.

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

20.

• Pi-lot: a mathematician who flies planes
• Pi-rate: a mathematician who steals ships
• Pi-oneer: a mathematician who settled the West
• Pi-azza: where Italian mathematicians hang out

21.

My password is the last 10 digits of pi. Good luck.

22. Subtitle: I’m Sorry In Advance

What do you call a pi that’s been left out in the sun? A baked number.

Terrible. Moving on immediately.

23.

I told my calculator I loved pi and it said ERROR: VALUE TOO LONG. Even technology knows pi’s got commitment issues.

24.

Okay sidebar, does anyone else find it suspicious that Albert Einstein was born on March 14th? Pi Day? The man was literally born on the most mathematical day of the year. The universe has a sense of humor and it’s mostly puns.

25. Caption-Ready

Cutie pi 🥧💕

(Tell me you haven’t seen this on a math teacher’s Valentine’s card. Tell me.)

26.

Why did pi get kicked out of the number line? It wouldn’t stay in its place.

27.

Pi and the square root of 2 walked into a bar. The bartender sighed. “Great, two irrationals.” Pi said, “At least I’m transcendental.” The square root of 2 has never recovered.

28.

What’s pi’s favorite day of the week? Pi-day. Which isn’t a day of the week but pi doesn’t follow rules.

29. This One’s For The Physics People

Why does pi show up in Coulomb’s law, the Heisenberg uncertainty principle, AND Einstein’s field equations? Because pi is the ultimate plus-one. Nobody invites it; it just appears.

Genuinely though, the ubiquity of pi in physics is kinda unsettling? Like why is a ratio about circles showing up in quantum mechanics? Anyway.

30.

I tried to write a song about pi but it had no end. The record label dropped me.

31.

What did the circumference say to the diameter? “You complete me.” And then pi stood in the corner, being the ratio nobody asked for but everyone needed.

32. Garbage Pun Alert

What do you call a pi that works out? Swole pi.

That’s not even a pun. I just wanted to say swole pi. I have no defense.

33.

“How’s your relationship with pi going?”
“It’s… complicated. It never ends, it’s irrational, and I can never fully understand it.”
“That’s not a relationship, that’s a marriage.”

34.

You know what’s irrational? Pi. You know what else is irrational? Me buying a third pie on Pi Day. Yet here we are.

35.

Pi: exists
Tau (2π) enthusiasts: “Am I a joke to you?”
Yes. Yes you are.

36.

What do you call a pi that tells jokes? A comedi-pi-n.

Ngl that one hurt to type.

37. Actually Good

I asked pi to describe itself in one word. It’s still talking.

38.

Why did pi refuse to go to the party? It knew it would never fit in, it’s not rational, not whole, and definitely not natural.

This one works on like four levels of number classification and I need you to appreciate that. Natural numbers, whole numbers, rational numbers, pi is none of them. It’s the mathematical outsider. The brooding loner of constants.

39.

My love for you is like pi: never-ending and slightly irrational 💘

(Another caption. Send it to someone. I dare you.)

40.

What did zero say to eight? “Nice belt.” What did pi say to eight? Nothing, pi doesn’t repeat itself.

41.

Parallel lines have so much in common. It’s a shame they’ll never meet. Pi, on the other hand, meets everyone, it shows up in every formula uninvited.

42. The Archimedes Deep Cut

Archimedes approximated pi using 96-sided polygons back in 250 BC. Ninety-six sides. That man drew a shape with 96 sides by hand and said “this is close enough to a circle.” Absolute dedication. You could say his work was… well-rounded.

But seriously, he got pi between 3.1408 and 3.1429. By hand. With a polygon. I can barely draw a square.

43.

Why was the math book sad? Too many problems and it couldn’t find its pi.

44.

Pi is like my ex. Goes on forever, never repeats, and I’m still not over it.

45. Cluster of Crimes Against Comedy

• What do you call pi in a suit? So-pi-sticated.
• What do you call pi sleeping? Pi-llow talk.
• What do you call pi on vacation? Tro-pi-cal.

I’m not proud. But I’m not deleting them either.

46.

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

47.

Pi Day is March 14th. Pi Approximation Day is July 22nd (22/7). If you think about it, every day with pi is an approximation day because we’ll literally never pin down the exact value. That’s either beautiful or deeply annoying depending on your personality type.

48.

Why is pi so humble? Because it knows it’ll never be whole.

49.

I once met someone who memorized pi to 1,000 digits. I asked them why. They said, “To impress people.” I was not impressed. I was concerned.

(Rajveer Meena holds the world record at 70,000 digits. Seventy. Thousand. The human brain is wild.)

50. The Halfway-ish Celebration

We’re past 50 and I’m still going. This is what pi does to a person, it makes you believe you can just keep going indefinitely. Irrational behavior, truly.

51.

What’s the official animal of Pi Day? The pi-thon. We already did this one. I don’t have infinite material, okay? I’m not pi.

52.

A pizza has a radius of z and a thickness of a. Its volume is pi·z·z·a.

Read that again. Volume = pi × z² × a. Pizza. PI-Z-Z-A. This is the greatest pi pun ever constructed by humanity and I will die on this hill. I didn’t invent it but I would tattoo it on my body.

53.

Why can’t pi ever win at poker? It always shows its hand, all infinite digits of it.

54.

“Dad, what’s pi?”
“3.14159…”
“No, I mean what IS it?”
“It’s the ratio of a circle’s circumference to its diameter.”
“Can you just help me with my homework?”
“…26535…”

55.

Be rational. Or don’t. Be pi. 🔢

56.

Pi is an infinite non-repeating decimal, which means somewhere in its digits is your phone number, your birthday, and the complete works of Shakespeare. Probably. (This is actually an unproven conjecture about whether pi is “normal”, it hasn’t been proven yet and tbh it drives mathematicians nuts.)

57.

What do you call it when pi and e get into a fight? An irrational argument with natural consequences.

58. The William Jones Shoutout

The symbol π was first used by Welsh mathematician William Jones in 1706. Before that, people just wrote out the whole concept longhand like savages. Jones saw a circle, saw a ratio, and said “this needs a brand.” The man was a pi-oneer. (I used that one already in #20 but context makes it better here, fight me.)

59.

I asked Siri what pi is. She’s still answering.

60. The Closer

Why do mathematicians love parks? Because of all the natural logs. Wait, that’s an e joke. Wrong constant. Let me redo this.

Why do mathematicians love bakeries? Because that’s where you find the best pi.

Okay I’m done. If you made it this far you’re either a math nerd, a pun addict, or procrastinating something important. Probably all three. Go eat some pie, you’ve earned at least 3.14 slices.