# Fill up on pi (in video form) on Pi Day

Get your fill of pi (videos) to celebrate Pi Day, including great short videos from Hank Green, James Grime, Veritasium and Physics Girl, Matt Parker, and (of course) Perimeter Institute.

Today is March 14 (3/14), which means it is Pi Day! It’s also Einstein’s birthday, so there are plenty of reasons to celebrate.

To get you in the mood, here are some fantastic videos celebrating every circle’s favourite irrational number, 3.141592653589793238462…

## Calculating Pi with Real Pies

How accurately can we calculate pi using hundreds of pies? Math comedian Matt Parker investigates.

## 3 Ways Pi Can Explain Practically Everything

Let Hank Green explain why pi is essential for everything from electric fields to the theory of general relativity.

## Pi Smackdown at Perimeter Institute

What happens when a physicist and a mathematician face off in the ultimate Pi competition? Comedy. This video features math comedian Matt Parker and Perimeter Institute researcher Tibra Ali.

## Pi and the Size of the Universe

How many digits of pi can you remember? How many do we really need? According to Dr. James Grime, 39 digits will do just fine.

## Calculating Pi with Darts

Looking for a fun way to calculate pi? How about darts? Watch beloved science YouTubers Physics Girl and Veritasium take aim at calculating pi with a little target practice.