Celebrate ฯ Approximation Day!
July 22 - Infinite Digits, Infinite Possibilities
Click to see how polygons approximate ฯ
ฯ โ 3.14159...
The Magic Number
3.14
Pi has been calculated to over 100 trillion digits!
Did You Know?
Ancient Calculation
The Babylonians estimated Pi as 3.125 around 1900 BC
Space Exploration
NASA uses just 15 digits of Pi for interplanetary navigation
Universal Precision
Only 39 digits of ฯ can calculate the universe's circumference within one hydrogen atom's accuracy
Musical Pi
ฯ's digits can be played as musical notes (C=0, D=1,...) creating infinite melodies
Indiana's Pi Law
In 1897, Indiana nearly passed a bill legally defining ฯ as 3.2 before mathematicians intervened
Pi in Nature
Rivers meander in paths where (actual length รท straight-line distance) averages ฯ
ฯ
Click me for a surprise!
๐ Personalized Pi Greeting
You found the secret Pi greeting generator!
Test Your Knowledge
How many digits of Pi can you remember?