When:Thursday, March 10 - Tuesday, March 15
Target Audience:K-12 students and educators, parents, museums, science centers and planetariums
Update: March 15, 2022 – The answers are here! Visit the NASA Pi Day Challenge slideshow to view the illustrated answer keys for each of the problems in the 2022 challenge.
NASA is joining schools, students and science centers across the U.S. to celebrate one of the most well known and beloved numbers: pi. Used throughout the STEM world – especially for space exploration! – pi is the number that results from dividing the circumference of any circle by its diameter. Pi can be and often is rounded to 3.14 (even though its decimals never end), which is why 3/14 has been designated National Pi Day.
Pi Day gives us a reason to celebrate the mathematical wonder that helps NASA explore the universe. And we're giving students a chance to join in the fun by using pi to explore Earth and space themselves in our ninth annual NASA Pi Day Challenge. The 2022 challenge features four all-new illustrated math problems that get students using pi like NASA scientists and engineers exploring Earth, the Moon, Mars, and planets beyond our solar system.
See our latest Teachable Moments article at the link below to learn more about this year's challenge. Plus explore more ways to celebrate Pi Day with free downloads, lessons, articles, and more.
Pi Day Challenge Resources
Teachable Moments: Pi Goes to Infinity and Beyond in NASA Challenge
Learn about pi and the history of Pi Day before exploring some of the ways the number is used at NASA. Then, try the math for yourself in our Pi Day Challenge.
NASA Pi Day Challenge - NEW for 2022
This collection of illustrated math problems gets students using pi like NASA scientists and engineers exploring Earth and space.
Pi in the Sky Lessons
Find everything you need to bring the NASA Pi Day Challenge into the classroom, including printable handouts of each illustrated math problem.
18 Ways NASA Uses Pi
Whether it's sending spacecraft to other planets, driving rovers on Mars, finding out what planets are made of or how deep alien oceans are, pi takes us far at NASA. Find out how pi helps us explore space.
How Many Decimals of Pi Do We Really Need?
While you may have memorized more than 70,000 digits of pi, world record holders, a JPL engineer explains why you really only need a tiny fraction of that for most calculations.
10 Ways to Celebrate Pi Day With NASA on March 14
Find out what makes pi so special, how it’s used to explore space, and how you can join the celebration with resources from NASA.
Multimedia & Downloads
Infographic: Planet Pi
This poster shows some of the ways NASA scientists and engineers use the mathematical constant pi (3.14) and includes common pi formulas.
Join the Conversation
Pi Day: What's Going 'Round
Tell us what you're up to this Pi Day and share your stories and photos on our showcase page.