Pi.mws Archimedes 's   Pi;  Calculation van Ceulen's   Pi;  Calculation Gregory's  series for arctan(x) Newton's   Pi;  Calculation Sharp's   Pi;  Calculation Machin's   Pi;  Calculation Euler's   Pi;  Formulas Rutherford's   Pi;  Calculation Dase's   Pi;  Calculation Clausen's   Pi;  Calculation Ramanujan's   Pi;  Formulas Shanks's and Wrench's   Pi;  Calculation Bailey's   Pi;  Calculation using Borwein's quartic formula Bailey, Borwein and Plouffe  binary digit extraction formula Kanada's   Pi;  Calculation