π
Chudnovsky Algorithm
Compute π to any number of decimal places
Precision Setting
digits
Quick Select
⚠ Calculations above 1,000 digits may take a moment. All computation runs directly in your browser using JavaScript BigInt arbitrary-precision arithmetic.
Computing
Initializing... 0%
Result
— Decimal Digits
— Compute Time
— Series Terms
π value
Chudnovsky Formula
1/π = (12/C³) · Σ [ (−1)ᵏ · (6k)! · (13591409 + 545140134k) ]
                ──────────────────────────────────────────
                (3k)! · (k!)³ · 640320^(3k)

Developed by brothers David & Gregory Chudnovsky in 1988, this algorithm yields approximately 14.18 correct decimal digits per term. It is one of the fastest known algorithms for computing π and has been used to set multiple world records. This implementation uses JavaScript BigInt for arbitrary-precision integer arithmetic.