Celebrating Pi Day 3.14
Ranked #69 in Education, #1,557 overall
Celebrate Pi Day - March 14th
Pi, approximately 3.14159, is the mysterious mathematical constant (number) that represents the ratio of any circle's circumference to its diameter.
Pi has its day, appropriately, on March 14 (3/14). Often a Pi Day celebration will have an extra special event set for pi minute (at 1:59pm). In the UK, Pi Approximation Day is often celebrated on July 22 (22/7) as 22 divided by 7 is an approximation for pi.
This day brings more fun to math classes around the world then anything else (second only to Math League). I wish you a very Happy Pi Day 2012!
Videos From Pi Day 2011
Pi Day Videos From Last Year
PiDay.org
Pi Day Official Website
- Pi Day - The official web site for Pi Day, March 14th
- Piday.org is the official web site for March 14th (3.14). Learn about pi, shop for pi t-shirts, share ideas about how to celebrate pi & pi day, enjoy pi-related multimedia, get one million digits of pi, and send pi day eCards. 3.141592653589793238462...
How Much Pi Do You Know?
Amazing Books about Pi
Door Prize!
Fun Ways to Estimate Pi
Quirky Pi Approximation Methods
- How to Calculate Pi by Throwing Frozen Hot Dogs
- wikiHow article about How to Calculate Pi by Throwing Frozen Hot Dogs.
- How to Calculate Pi by Firing Cannonballs
- wikiHow article about How to Calculate Pi by Firing Cannonballs.
- How to Calculate Pi by measuring round items
- Worksheet for calculating Pi by measuring round items.

Pi Day T-Shirts
Send a Free Pi Day eCard
Free Electronic Pi Day Greeting Cards
- Pi Day Grettings from 123Greetings
- 8 Free Greeting Cards
- Free Pi Day eCard from BlueMountain.com
- 1 Free eCard
- 1 Free Greeting form PiDay.org
- 1 Free Pi Day Greeting
About Pi Day
Pi Approximation Day is another pi holiday. Pi Approximation Day is usually celebrated on July 22. 22/7 is a rough approximation for pi (and in the European date format that is July 22).
Pi can also be celebrated on the 314th day of the year, which is usually November 10th, but November 9th in leap years.
Pi To The 50th Decimal Silk Tie
by Wild Ties
Men's Pi To The 50th Decimal Extra Long Silk Tie by Mr. G33K in Green
Amazon Price: $27.95 (as of 02/13/2012)![]()
Not for the wanna-bes or the imitators, this necktie is for the true and the proud. This tie is for the nerds. Featured within this grand necktie is the great and almighty symbol of Pi. However, it is behind this symbol where the real intellect lays. It is here that pi is calculated in all its glory to the fiftieth decimal point. Your math teacher may know pi to the fifth decimal and you may even have a friend who knows it to the twelfth, but you are sure to impress them all when you have pi to the fiftieth decimal point. With pi it is all about respect and if you are sporting anything below 25 you may as well go home. And you don't want to go home, so sport your pride and receive the respect you deserve. Your time is now.
More Math & Pi Ties
(and an amazing pair of Pi cufflinks)
Sir Cumference and the Dragon of Pi
by Cindy Neuschwander
Sir Cumference and the Dragon of Pi (A Math Adventure)
Amazon Price: $3.38 (as of 02/13/2012)![]()
When Sir Cumference drinks a potion which turns him into a dragon, his son Radius searches for the magic number known as pi which will restore him to his former shape.
Pi Day Activities
Secant! tangent! cosine! sine! 3.14159! Goooo Pi Day!
- Math Forum: Pi Necklace
- Making a Pi Necklace by Diana Funke
- The Pi-Search Page
- The Pi-Search - Search For a string of digits within the number pi.
- Activities @ TeachPi.org
- Great list of activity ideas for celebrating Pi Day.
Pi Day Links
- The Exploratorium's 2008 20th Annual Pi Day Celebration
- Featuring What is Pi Day? Pi Day Activity Schedule, Pi Day in Second Life, A Short History of Pi, Discovering Pi, Cutting Pi Pi-Ku (haiku), Pi Limericks, ...
- Math Forum: Ask Dr. Math FAQ: About Pi
- What is Pi? Who first used Pi? How do you find it? What is it for? How many digits is it?
The Pi Song
Pi Day Songs

Happy Pi Day
(to tune "Happy Birthday")
Happy Pi Day to you,
Happy Pi Day to you,
Happy Pi Day, Three Point One Four.
Happy Pi Day to you.
We Wish You a Happy Pi Day
(to tune "We Wish You a Merry Christmas")
We wish you a happy Pi Day
We wish you a happy Pi Day
We wish you a happy Pi Day
Because math is fun
Pi digits for you
We cannot ignore
Pi digits never ending
Start with three point one four!
More Pi Day Songs
Albert Einstein
(Photo of Albert Einstein Impersonating Gene Simmons from Kiss)
What to Eat at a Pi Day Party?
Pi Day Foods and Snacks

-
Pie!
Any pie will do, but if you can put the symbol pi into the crust of say an apple or cherry pi it is even more festive. -
Pizza!
A pizza pie is a great add to a Pi Day party. To go all out, put pepperoni on in the shape of pi. - Cookies or cupcakes decorated with Pi are great ideas
-
Coffee, pie and donuts
A mnemonic for C = pi*d is Coffee Pie Donuts - Anything else round - It would be best to have all of your refreshments be round to keep the theme going. Donuts, cheerios, M&Ms, ...
More Pi Day Activity Ideas
Things to Do for Pi Day
- Make a paper chain out of 10 different colored papers. Choose one color to correspond with each digit, and see how long you can make it.
- Pi Rhythm - Assign each of 10 students a digit. Have the digits of pi visible to everyone. Have students pat there legs in a steady rhythm. Have the students call out their digit when it comes up in the rhythm. Whenever a student messes up, they get "dinged". The person with the least "dings" after a set amount of time wins.
- Compose pi nursery rhymes.
Do You Celebrate Pi Day?
Pi Art
Pi Quotes

- "Love is like pi - natural, irrational, and very important." -- Lisa Hoffman
- "Programming graphics in X is like finding the square root of PI using Roman numerals" --Henry Spencer
- "So here we have pi squared, which an engineer would call 10." --Frank King
- "It helps us understand what pi is, not just food." --Robert Toth
- "Pi is not merely the ubiquitous factor in high school geometry problems; it is stitched across the whole tapestry of mathematics, not just geometry's little corner of it. Pi occupies a key place in trigonometry too. It is intimately related to e, and to imaginary numbers. Pi even shows up in the mathematics of probability." --Robert Kanigel
- "Exploring pi is like exploring the universe" -David Chudnovsky
- "Pi is not just a collection of random digits. Pi is a journey; an experience; unless you try to see the natural poetry that exists in pi, you will find it very difficult to learn" --Antranig Basman
- More Pi Quotes
Countdown to Pi Day 2012
400 Digits of Pi
3.14159265358979323846264338327950288419716939937510582097494459230
7816406286208998628034825342117067982148086513282306647093844609550
5822317253594081284811174502841027019385211055596446229489549303819
6442881097566593344612847564823378678316527120190914564856692346034
8610454326648213393607260249141273724587006606315588174881520920962
829254091715364367892590360011330530548820466521384146951941511609
Mmmm. Do I smell Pi?
A Perfect Gift for Pi Day 2011
PI by Givenchy Eau De Toilette Spray 1 oz For Men
Amazon Price: $35.88 (as of 02/13/2012)![]()
p = Pi, the 16th letter of the Greek alphabet is today the symbol of the new masculine fragrance by Givenchy. Explore p, explore the universe. Givenchy offers a mystery beyond infinity. The fragrance combines a fresh scent of patchouli and sandalwood.
Ladies, this is a great Pi day gift for that special man in your life!
About Pi
- Pi chronology
- The time line of Pi.
- Pi history
- The history of Pi.
- Math Forum: Ask Dr. Math FAQ: About Pi
- What is Pi? Who first used Pi? How do you find it? What is it for? How many digits is it?
How do I Type the Symbol Pi?
π
& 960;
π
In a word processing program go to Insert-Special Characters
Celebrate Pi in English Class
Pi Day Beyond Math Class
For example:
3.1415926535...
Him, I love. I exist, amazingly. So absent bliss. All alone. ...
Another great idea is to write your own Pi-ku math poem. Who wouldn't love a Pi Haiku?
Pi Day Greeting Cards
Which is cooler?
The Pi or e Debate
The age old debate. Which is cooler pi or e?
At your Pi Day Party, hold a mathematical debate. Assign a person to speak for pi and another to speak for e.
Which is cooler?
Fetching blurbs now... please stand by
Mathlete says:
Pi- there is no other fraction, nor any number like. Though the end is a mystery, we have been memorizing its digits throughout history. To quote a part from ?Born on a Blue Day?, Daniel Tammet says: "...pi is for me an extremely beautiful and utterly unique thing. Like the Mona Lisa or Mozart symphony, pi is its own reason for loving it."
Oh yeah, and approximation is for wimps... just joking.
Oh ya, I can't see the picture, so I hope I that I click pi...
Posted January 29, 2012
sunny says:
pi is the best day
Posted July 10, 2011
Teddi14 says:
My birthday is 3.14 I have your lens featured on mine http://www.squidoo.com/birthday_March_14
Posted March 10, 2011
william says:
they are both equally awesome
Posted February 15, 2011
jp1978 says:
Have I commented in this before? Today e is cooler, which rhymes with Euler. Also, e is more "natural".
Posted October 22, 2010
Steph says:
the derivative of e^x is e^x. that is pretty much magical.
Posted March 14, 2010
roller says:
i like pie
Posted March 14, 2010
KarateKatGraphics says:
I had a college math prof who said that e "flows in the rivers." Sold! :) But my kids dig pi. Whenever they need to fill in a number on Mad Libs, they choose pi. Works great every time.
Posted April 07, 2009
Why pi is cooler than e:
Debate points for pi
- the value of pi is bigger
- pi is so special, it only shows under "special symbols" in word processor programs.
- People confuse Euler's Number (e) with Euler's Constant (gamma). There is no confusion with the one and only pi
- e is named after a person, but pi stands for itself
- pi cannot be confused with a hallucinogenic drug
- pi is tasty
- Pi Day rocks! No one cares about e Day.
Why e is cooler than pi:
Debate points for e
- e is easier to spell than pi
- e is on a keyboard, but pi is not
- ln(pi) is a ugly, but ln(e) is 1.
- e is used in calculus while pi is used in baby geometry
- 'e' is the most commonly picked vowel in Wheel of Fortune.
- You don't need to know Greek to be able to use e
- You can't confuse e with a dessert
Pi Jokes
Baker: No! Pie are round, cake cornbread are square!
-----
A mathematician, a physicist, and an engineer are all given identical rubber balls and told to find the volume. They are given anything they want to measure it, and have all the time they need. The mathematician pulls out a measuring tape and records the circumference. He then divides by two times pi to get the radius, cubes that, multiplies by pi again, and then multiplies by four-thirds and thereby calculates the volume. The physicist gets a bucket of water, places 1.00000 gallons of water in the bucket, drops in the ball, and measures the displacement to six significant figures. And the engineer? He writes down the serial number of the ball, and looks it up.
---
In Alaska, where it gets very cold, pi is only 3.00. As you know, everything shrinks in the cold. They call it Eskimo pi.
---
What do you get if you divide the circumference of a jack-o-lantern by its diameter?
Pumpkin pi.
---
What do you get when you take the moon and divide its circumference by its diameter? Pi in the sky.
---
What do you get if you divide the circumference of a bowl of ice cream by its diameter?
Pi a'la mode.
Celebrate Pi Day By Doing What You Love
But Pi Oriented
- If you love music, play Pi on a piano or instrument of your choice.
- If you love photography, take your camera to the streets and photograph numbers on buildings and signs in your town and then line them up to Pi. Take single digits, and also try to get some photos of strings of numbers. Then create a display of your photos. Check out this great example: Pi Day to the 36th digit.
- If you love sports, find photos of athletes wearing their numbered jersey's and line them up to represent Pi. Babe Ruth wore #3. That's a great place to start. Then choose an athlete that wore 1 or 14 and continue for the first however many digits of pi you wish to display.
- If you like making movies, create a stop action animation using anything...sand, legos, pencils, soda cans, people, anything.
- If you like acting, write a Pi Day skit and perform it.
- If you like writing, write a Pi poem, or create a false newspaper that includes fake Pi related stories (complete with ads, classifieds, and obituaries).
-
If you like cooking, bake a Pi Pie. Another food idea is to use a serving dish shaped like a cylinder, half sphere, or even a cone, and prepare something in it, and display the calculations for the volume of that item. For instance, if you make a trifle in a trifle bowl
(which is nearly a cylinder), you can calculate volume with this equation.
Pi in the Sky
Pi (1998)
Starring: Sean Gullette, Mark Margolis
Pi
Amazon Price: $3.98 (as of 02/13/2012)![]()
Max Cohen, played by Sean Gullette, is a mathematician searching for the patterns that exist in the world - in nature, science, society, business - everywhere. However in this low-budget black and white psychological drama, Max is not the only one searching for patterns. Everyone seems to be searching for patterns in order to progress their cause - whether financial, religious, or political. And now, Max has dropped deeply into paranoia.
This is a complex movie, that requires your full attention.
It's not for the light happy Pi Day celebration, but a great watch at night after all the Pi Day celebrations are over.
Pi won the Director's Award at the 1998 Sundance Film Festival.
The Punny Pi Guy
At your Pi Day event, interview a guy with pi symbols stuck all over him. Have all of his answers be pi related - heavy on the puns. It's best when the interviewer gets annoyed at the puns and tries to come up with harder questions (to which Punny Pi Guys always has an answer for).For example:
Q. What's your favorite food?
A. Pie.
Q. Other than pie.
A. Pizza pie.
Q. Other than pizza pie.
A. Paella?
Q. What's you favorite story?
A. Peter Piper
Q. What do you want to be when you grow up?
A. A Pilot.
Q. Your favorite movie?
A. Pirates of the Caribbean
Al G. Bra's Pi Day Video Collection
Pi In The Bible
Is Pi in the Bible? Well, yes, sort of.In the description of Solomon's Palace, specifically in the verse I Kings 7:23, the Bible gives the dimensions of a round "molten sea", which is an immense round basin of cast metal. Since it gives enough dimensions, we can work backwards to calculate pi. The Bible says the following:
And he made a molten sea, ten cubits from the one brim to the other: it was round all about, and his height was five cubits: and a line of thirty cubits did compass it about. (KJV)
The problem that arises is that if you do the math on those figures then pi equals 3, but we know this is not accurate. I believe that since the Bible is not a science book, or a math book, that this error is simply stems from the writer rounding to the nearest cubit.
Visit this site for more information on Pi In The Bible.
Pi mp
Pi Symbol Ice Cube Trays
Frozen H2O Shaped Like Your Favorite Irrational Number
When hosting the Pi Day soirée at your geek bachelor pad you'll need the proper equipment to ensure success. Square ice cubes just will not do. Round out your party with ice from these super pi ice cube traysAlso check out the ultimate in Pi Day cocktails...the Pi-Tini.
Pi Day News
Fetching RSS feed... please stand byPizza Pi Cutter

Comes in your choice of three colors: Black, Red, and Lime. Lime is a fancy way of saying green.
Buy your own Pizza Pi Cutter
Pi Day Guestbook
Here you can wish everyone a Happy Pi Day, share your Pi Day stories and ideas, and ask any Pi questions.
-
Reply
-
Aquavel
Feb 8, 2012 @ 2:30 am | delete
- Whoops! Just realize I was getting Pi mixed up with the Golden Section (Mean). I now realize there is a difference (For one, the number is slightly different) but there's a relationship too. I'm off to research it! By the way, this is an awesome lens!
-
-
Reply
-
Aquavel
Feb 8, 2012 @ 2:19 am | delete
- Didn't know there was a Pi day. I'm going to celebrate this year by rewatching the first episode of the new cable TV show "Touch." (The next episode isn't until March 19th). Also I'm going to learn 8 digits of Pi, be appreciative of the nautilus shell on my bathroom counter, and maybe make some new fractal art. And perhaps I'll have pie for breakfast.
-
-
Reply
-
jimmyworldstar
Feb 4, 2012 @ 11:57 pm | delete
- I'd celebrate by eating a pie or a pizza pie. I'm not too big on math but it's interesting in the realm of mathematics.
-
-
Reply
-
blackspanielgallery
Feb 2, 2012 @ 7:50 pm | delete
- Nice lens,
-
-
Reply
-
COUNTRYLUTHIER
Jan 6, 2012 @ 8:40 pm | delete
- I like having my Pi, pity I can't eat it too! Oh the rap was off the pi chain!
-
-
Reply
-
ana_nimoss
Oct 16, 2011 @ 10:48 pm | delete
- This was very fun and interesting lens!
-
-
Reply
-
Makita
Aug 16, 2011 @ 9:53 pm | delete
- What a great lens! Kudos! :)
-
-
Reply
-
iijuan12
Aug 4, 2011 @ 7:29 pm | delete
- I featured your great lens on my math curriculum lens: http://www.squidoo.com/my-homeschool-math-curriculum-for-preschool-through-elementary-school-level
-
-
Reply
-
phoenix-arizona-friends
Jul 26, 2011 @ 6:53 pm | delete
- I love to eat pie of pi day :)
-
-
Reply
-
SunShine80
Mar 27, 2011 @ 8:31 am | delete
- Pi is an interesting number. Take each digit in turn and it seemingly gives you a sequence of random digits between 0 and 9. The sequence does indeed pass all the tests for a random number generator. Nobody has yet proved that the sequence is recurring or that any digit between 0 and 9 is more likely to occur than any other..
-
-
Reply
-
LabKitty
Mar 23, 2011 @ 7:53 pm | delete
- Hi Kab - don't know if you've seen this (timestamp says March 23, 2011) but it's pretty slick:
http://www.youtube.com/watch?v=YOQb_mtkEEE
-
-
Reply
-
MelvinR88
Mar 21, 2011 @ 5:41 am | delete
- Great lens!!! Very extensive information about pi.
-
-
Reply
-
tandemonimom
Mar 17, 2011 @ 3:14 pm | delete
- ** BLESSED ** and featured on Blessed by Tandemonimom!
-
-
Reply
-
AVF281
Mar 16, 2011 @ 2:15 am | delete
- A very unique lens; it describes the importance of Pi Day not only in math, but also beyond.
-
-
Reply
-
StephenC
Mar 14, 2011 @ 9:31 am | delete
- Great lens! Happy pi day!
-
- Load More
by kab
I like a bit of everything. I'm a jack of all trades - ace of only ten or eleven. more »
- 300 featured lenses
- Winner of 29 trophies!
- Top lens » The Best Movie Kisses of All Time
- This lens »
Won purple star

Explore related pages
- If you were a robot, and I knew but you didn't, would you want me to tell you? If you were a robot, and I knew but you didn't, would you want me to tell you?
- Triskaidekaphobia Triskaidekaphobia
- Mole Day: October 23 Mole Day: October 23
- Celebrate Pi Day 3.14 - Mad March Holiday 4 Math Geeks Celebrate Pi Day 3.14 - Mad March Holiday 4 Math Geeks
- Circles, Maths and Pi Day Circles, Maths and Pi Day
- The Magic of Number Pi The Magic of Number Pi











































