# Factorial Calculator

> Calculate n! for any non-negative integer up to 170 with full step-by-step expansion, supporting big numbers via BigInt.

**URL:** https://www.calculatoranswers.com/factorial-calculator
**Category:** Education

## Quick Answer

Calculate factorials (n!) for non-negative integers up to 170. Get exact long integer values via BigInt, scientific notations, and full product expansions.

## Definition

A factorial calculator is a mathematical counting utility that computes the product of all positive integers less than or equal to n. It employs arbitrary-precision integer arithmetic to preserve exact digits for inputs above 20! and displays progress lists and scientific notation fallbacks.

## How to Use

1. **Enter a number** — Type a whole non-negative integer (n) up to 170.
2. **Optional: Show list** — Toggle the progression table option to list factorials from 0! to n!.
3. **Read output** — View the factorial value in scientific notation, exact decimal form, and step expansions.

## Disclaimer

This calculator provides estimates for educational and planning purposes. Always consult a qualified professional for specific advice on financial, medical, legal, or other regulated decisions.

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