Factorial Calculator (n!) 🧮

Compute the factorial of any non‑negative integer instantly. Supports large numbers with high precision (BigInt).

🔠 Font Size:

Enter integer n (n ≥ 0):

📐 Result

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⚡ Supports up to n=5000 (BigInt). Large results displayed with truncation if exceeding 500 chars.

📖 About Factorials

The factorial n! = n × (n-1) × ... × 1, with 0! = 1. Used in combinatorics, probability, and algebra. Our calculator uses JavaScript BigInt for exact integer results even for large n.

✨ Optimized & Responsive

Fully responsive design, works seamlessly on desktop, laptop, tablet, and mobile. Right-to-left support for Arabic/Hebrew, adjustable font size, day/night themes, and meta tags for SEO excellence.