Pi Day is celebrated on March 14th (3/14) around the world. Pi (Greek letter “ π ”) is the symbol used in mathematics to represent a constant — the ratio of the circumference of a circle to its diameter — which is approximately 3.14159.

Learn About Pi. What Is Pi? Pi Symbol; One Million Digits of Pi; Raspberry Pi. Raspberry Pi Explained; Raspberry Pi Projects; What is Raspberry Pi? Math Help. Simplifying Fractions; Adding Fractions; Subtracting Fractions; Multiplying And Dividing Fractions; Find GCF And LCM; Math FAQ; Why Math Is Important; Calculators. Fraction Calculator ...

A few ideas include mini pi-shaped pies, pi-shaped turnovers, and baking a pizza pie with pepperoni in the shape of the pi symbol. The possibilities are endless (just like pi!). After the baking is done, you can hold a pie-eating contest or a fundraiser.

Ways to Celebrate Pi Day; Pi Project; Your Birthday in Pi; Teacher Resources. Pi Day Coloring Pages

Learn what the pi symbol represents and where it came from. Click here to see why pi is so great!

Top Ten Ways to Celebrate Pi Day Pi Day is celebrated every year on the fourteenth of March around the world, and although we’re not celebrating actual pies, there can be pies involved in the celebration. Pi is used to represent a mathematical constant. Not only is it the ratio of a circle’s circumference to … Read more

Pi Day is a website created to encourage an interest in STEM topics. Science, technology, engineering, and math are all cornerstones of modern life. Our team at Pi Day is passionate about making these topics interesting and easy to understand.

Welcome to the calculator section of Pi Day, listed below are numerous calculators that will help you with all sorts of math problems. From geometry calculators to financial calculators, we probably have the one you need!

Celebrate Pi Day in style. Wear one of these official Pi Day shirts and join the world in celebrating the best day of the year. The compliments you’ll receive will go on and on, just like the digits of pi.

For example, if we know the circumference, but don’t know the radius, you can solve c = 2πr for r and get \(r = \frac{c}{2\pi}\). Similiarly, if you want the diameter from the circumference, simply take c =πd and solve for d to get d = \(\frac{c}{\pi}\).