ZovaTool

Big Number Calculator

Result

1111111110111111111011111111100
31 digits in first number

How to use the Big Number Calculator

  1. Enter two integers of ANY length (hundreds of digits OK).
  2. Pick +, −, ×, ÷ (with remainder), mod or exponent.
  3. Exponents capped at 9999 to keep results sane.
  4. Digit count of result is shown below.
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Big numbers: when 64 bits aren't enough

JavaScript's normal Number type loses precision above 2^53. BigInt removes that limit and lets you compute factorials, cryptographic keys, and astronomically large sums exactly.

Common use cases: RSA-style key arithmetic, combinatorics (100!), cryptocurrency token math (18-decimal places), and Project-Euler-style puzzles.