Computing Pi

Calculator nameSummary
Pi (Polygons based) Calculates circular constant Pi using the perimeters of regular polygons inscribed in and circumscribed about a circle of diameter 1.
Pi (Viete's formula) Calculates circular constant Pi using the Viete formula.
Pi (ATAN two terms) Calculates circular constant Pi using arc tangent (ATAN) series with two terms.
Pi (ATAN three terms) Calculates circular constant Pi using arc tangent (ATAN) series with three terms.
Pi (ATAN four terms) Calculates circular constant Pi using arc tangent (ATAN) series with four terms..
Pi (Ramanujan's formula) Calculates circular constant Pi using the Ramanujan-type formula.
Pi (AGM method) Calculates circular constant Pi using the Arithmetic-geometric mean method (AGM).