Pi Calculator

Pi (π) Calculator

Explore the mathematical constant π (pi) with precision control, calculations, and fascinating facts about this fundamental number.

π
3.14159265358979323846264338327950288419716939937510
Famous Approximations
22/7
≈ 3.142857
355/113
≈ 3.141593
√10
≈ 3.162278
(9²+19²/22)^(1/4)
≈ 3.141593
Circle Circumference
C = 2πr
Circle Area
A = πr²
Sphere Volume
V = (4/3)πr³
Sphere Surface Area
A = 4πr²

Fascinating Facts About π

Irrational Number
π is an irrational number, meaning its decimal representation never ends or repeats. It has been calculated to over 100 trillion decimal places!
Ancient Discovery
The ancient Babylonians approximated π as 3.125, while the Egyptians used 3.16. Archimedes calculated it as between 3.1408 and 3.1429.
Pi Day
March 14th (3/14) is celebrated as Pi Day worldwide, celebrating this fundamental mathematical constant and its importance in mathematics and science.
Universal Constant
π appears not just in circles, but in probability, statistics, physics, and many areas of mathematics. It's truly a universal constant!

How to Use the Pi Calculator

The Pi Calculator is an educational and computational tool that displays the mathematical constant π with adjustable precision and provides various π-related calculations. Use the precision controls to view π to different decimal places, from basic 2-digit approximations to highly precise 50-digit representations. The calculator includes four common geometric calculations that utilize π, allowing you to see how this fundamental constant applies in real mathematical problems.

Understanding π is essential for geometry, trigonometry, calculus, physics, and engineering applications. This calculator helps students and professionals explore the properties of π while solving practical problems involving circles, spheres, and other geometric shapes. Whether you're calculating the circumference of a wheel, the area of a circular plot, or the volume of a sphere, this tool provides accurate results while deepening your understanding of this remarkable mathematical constant.

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Circle Circumference
C = 2π × 5 = 31.416 units

Distance around the circle's edge

Circle Area
A = π × 5² = 78.540 square units

Space enclosed by the circle

Sphere Volume
V = (4/3)π × 5³ = 523.599 cubic units

3D space occupied by the sphere