Factorial Calculator

Compute exact factorials with arbitrary-precision integer arithmetic.

Factorial Calculator
Local input
Output
Processing…
About this tool

Made for the task at hand.

Multiply every integer from 1 through n using exact big-integer arithmetic, avoiding floating-point rounding for large factorials.

How to use

  1. Enter one non-negative integer up to 1000.
  2. Review the exact n! result.
  3. Use the digit count to gauge the expanded value.
Your work stays yours.
Tool inputs are processed locally in your browser and are never sent to KitVerse servers. Clear the workspace when using a shared device.
Common questions
What is 0!?

By definition, 0! = 1, which is also the empty product.

Why is input limited to 1000?

Exact output grows quickly; the limit keeps browser computation and the displayed result manageable.