Calculate π using Chudnovsky Algorithm

The Chudnovsky algorithm is a fast method for calculating the digits of π, based on Ramanujan's π formulae. Published by the Chudnovsky brothers in 1988. It was used in the world record calculations of 202 trillion digits on June 28, 2024.*

\[ \frac{1}{\pi} = 12 \sum_{k=0}^{\infty} \frac{(-1)^k (6k)! (545140134k + 13591409)} {(3k)! (k!)^3 (640320)^{3k + \frac{3}{2}}} \]

Calculated terms: 5 | Show error:
Time Used: ms | Correct digits:

π ≈