# Pi (AGM method) Calculator

## Calculates circular constant Pi using the Arithmetic-geometric mean method (AGM). | ||

The calculation ends when two consecutive results are the same. The accuracy of π improves by increasing the number of digits for calculation. In 1976, Salamin and Brent discovered the new algorithm for calculating Pi based on the Gauss’s AGM formula (1809). The algorithm is quadratically convergent and each step of the algorithm doubles the number of correct digits. |

Related links |

D.H. Bailey et al. "The Quest for Pi" (1996). |

Pi (AGM method)

[1-2] /2 | Disp-Num |

- Purpose of use
- I was curious about is there some algorithm, beyond those I have already knew, for example the 9th order one, but it was not explained, unfortunately ...
- Comment/Request
- Nicely explained, the 9th order algorithm just mentioned ....
- from Keisan
- About the 9th order algorithm,

please refer to the "Related links".

[1] 2017/09/13 07:17 Male / 50 years old level / An engineer / Very /

- Purpose of use
- cross check some FORTRAN and c programs

attempt to improve a partial differential equation solution

[2] 2015/04/23 08:28 Male / 60 years old level or over / An engineer / A little /

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