Digits of Pi Logo - Pi symbol in a circle

Digits of Pi – Explore the Infinite Number

See the first 100, 1,000, or 1,000,000 digits of π, learn fun facts, and test your memory with our interactive Pi calculator and educational tools.

Start Exploring Pi

Explore Pi Digits

Select how many digits you want to explore. View, scroll through, and copy up to 1 million digits of Pi's infinite decimal sequence.

Pi Memory Challenge

Test your memory! Type the digits of Pi in order and see how many you can remember correctly.

How to Play

  • • Type the digits of Pi starting with 3
  • • Continue as far as you can remember
  • • The game ends when you make a mistake
  • • Try to beat your high score!

What is Pi (π)?

Learn about the mathematical constant that has fascinated scientists and mathematicians for millennia.

Pi (π) is one of the most important mathematical constants, representing the ratio of a circle's circumference to its diameter. This ratio is the same for all circles, regardless of their size, and equals approximately 3.14159.

Pi is an irrational number, meaning it cannot be expressed as a simple fraction and its decimal representation goes on forever without repeating. Mathematicians have calculated trillions of digits of Pi using powerful computers, yet the sequence never ends and never forms a pattern.

Applications of Pi in Science and Mathematics

Geometry & Trigonometry

Essential for calculating areas, circumferences, volumes of circles, spheres, and cylinders.

Physics & Engineering

Used in wave functions, oscillations, quantum mechanics, and design of rotating machinery.

Statistics & Probability

Appears in normal distribution curves and probability theory calculations.

Cosmology & Space Science

Critical for calculating orbital mechanics, celestial movements, and space trajectories.

Computer Science

Used in algorithms, random number generation, and testing computer performance.

History of Pi

The symbol π was first used by Welsh mathematician William Jones in 1706, and popularized by Swiss mathematician Leonhard Euler in 1737. Ancient civilizations including the Babylonians and Egyptians knew approximations of Pi as early as 2000 BCE. The ancient Greek mathematician Archimedes was one of the first to calculate Pi accurately using geometric methods around 250 BCE.

Today, Pi remains essential in fields ranging from pure mathematics to applied sciences and engineering, making it one of the most recognized and studied mathematical constants in human history.