Value of pi was first given by the semi god Krishna in Mahabharata to 32 accurate decimal places .In fact it can be extended more.Archimedes long later used an approximation method to calculate pi to 4 decimal places
see the link below for how to calculate pi to 32 accurate decimal places
http://archives.amritapuri.org/bharat/bharat.php
Archimedes
Euclid
Liu Hui
Liu Hui
Liu Hui of the Wei Kingdom around 265 AD.
Archimedes was the first Western mathematician to make a serious attempt at calculating the value of pi. His estimated, that pi was between 3.1408 and 3.1429.
Archimedes
Archemedes
Zu Chongzhi was the Chinese mathematician who computed the value if pi.
Archimedes
Archimedes
Euclid
M.C. Ethster
Pi is a number between 3.14159265358979323846264338327950288419716939937510 and 3.14159265358979323846264338327950288419716939937511 First estimated by Greek mathematician Archimedes around 250 B.C., Chinese mathematician Zu Chong Zhi confirmed the actual value of pi. Pi is the ratio of the circumference to the diameter of a circle and appears as a constant in many mathematical expressions. It is represented by the symbol π. It has over 200 billion decimal places.
Liu Hui
Liu Hui
Archimedes (287-212 BC) was the first mathematician to make a serious attempt.