A quick and easy approximation for π is 22/7. 22/7 = 3.1428571... But as you can see, 22/7 is not exactly right. In fact π is not equal to the ratio of any two numbers, which makes it an irrational number. A really good approximation, better than 1 part in 10 million, is: 355/113 = 3.1415929...

Use our pi calculator to get the value of pi with with any number of digits or decimal places until one hundred thousand.

Scientific calculator online, mobile friendly. Creates series of calculations that can be printed, bookmarked, shared and modified in batch mode.

However, the Leibniz formula can be used to calculate π to high precision (hundreds of digits or more) using various convergence acceleration techniques.

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The following is a list of significant formulae involving the mathematical constant π. Many of these formulae can be found in the article Pi, or the article Approximations of π. where C is the circumference of a circle, d is the diameter, and r is the radius. More generally,

The number π (/ p aɪ / ⓘ; spelled out as pi) is a mathematical constant, approximately equal to 3.14159, that is the ratio of a circle's circumference to its diameter. It appears in many formulae across mathematics and physics , and some of these formulae are commonly used for defining π , to avoid relying on the definition of the length ...

Pi Scientific Calculator. The calculator below allows you to use Pi to calculate other equations. Simply click the π symbol on the calculator then the calculation you want to carry out. For example 3 times π = 9.42477796077

Pi Calculator. Pi calculator is used to find the digits of the “Pi number”. What is Pi? Pi is a mathematical constant that represents the ratio of a circle's circumference to its diameter. It is an irrational number, meaning it cannot be expressed as a finite decimal or a fraction.

Pi Calculator is a user-friendly online tool designed to calculate the value of Pi (π) to a specified number of decimal places. Simply enter the number of start decimal places and the number of digits you need, and the calculator will generate the value of Pi (π) instantly.