THE PI CALCULATOR"
Number of Terms:
Pi:
Actual Pi:

How it works:

This is how Maths works out pi to 1000 decimal places...
The maths;
pi/4 = 1 -1/3 + 1/5 - 1/7 + 1/9 - 1/11 + 1/13 - 1/15
Neverending, pattern above,infinite number of terms.