It’s Pi Day all month long! We’re celebrating everyone’s favorite mathematical holiday with a contest, so anything inspired by the number π is eligible: both edible and non-edible projects.

The winner of this contest will get bragging rights, as well as a brand new iPad Mini and smart kitchen scale. All finalists will receive a fancy pie & cake server, plus an Instructables prize pack.

Well, the number pi may be irrational, but that doesn’t mean you have to be. It’s time to enter the contest! What are you waiting for?

Want more contests? Check out Instructables' current contests here!

The Pi Day Challenge 2016 is closed.

Grand Prize

26 Prizes

Grand Prize (1)

One Grand Prize winner will receive:

Runner Up (25)

Twenty five runner up prize winners will receive:
How It Works

Write an Instructable

Create a new Instructable that fits the guidelines outlined in the contest description above. To be eligible, Instructables must be published between Mar 7, 2016 and Apr 4, 2016 (11:59pm PT).


Upon publishing your Instructable you'll see checkboxes for open contests. Select Pi Day Challenge 2016. If you have entries currently eligible for entry, it will also show up by clicking "Enter this Contest" on the right side of this page.


Entries are accepted by Instructables staff within one business day Monday - Friday. What matters is the submission time, not acceptance time.


A panel of judges made up of Instructables staff and respected members of the community rate the finalists. The averages of the ratings determine the winners.


When the winners are decided they will be notified and announced here on the contest page.