Have you heard? March 14 is Pi day!

Not sure what Pi is? Pi is a number used to represent the ratio of a circle’s circumference and diameter and is often approximated to 3.14. However, Pi is actually an irrational number that goes on and on forever. It never ends! Check out the bottom of this page to see many digits of pi.

Calculate pi

Now let’s celebrate this amazing number on March 14 with these Pi day activities:

1) Find circles or cylinders around the house or school and measure their diameter and circumference with a measuring tape. Divide each circle’s circumference by its diameter.  How close did you get to 3.14? Collect a lot of calculations. Calculate the average. Now how close did you get to pi?

2) Plan menus to include circular foods such as  pancakes, pies, cookies, casseroles, etc.

3) Hold a contest to see who can recite the most digits of pi.

4) Read any of the books in the Sir Cumference series by Cindy Neuschwander. I especially like Sir Cumference and the First Round Table and  Sir Cumference and the Dragon of Pi.

5) Host a pie in the face or pie eating contest. Raise money for a local charity.

6) Give each student/child a digit of pi and a corresponding colored rectangle. Create a chain to hang with many digits of pi. How long was your chain? Compete across schools, classrooms, or classes.

7) Host a contest for the best decorated Pi symbol.

Get creative! How will you celebrate Pi day? Leave me a comment. I’d love to know what Pi day activities you will be doing!

Pi is approximately

















Need more digits? 100,000 digits of pi can be found at http://www.geom.uiuc.edu/~huberty/math5337/groupe/digits.html

Not enough? 1,000,000 digits of pi can be found at http://www.piday.org/million/

Still looking for additional inspiration? Check out our pinterest board Celebrate Pi Day.

Angela Culley
Pi Day Activities to Celebrate Math!
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