Free online factorial calculator. Calculate the factorial (n!) of any positive integer. Great for math learning, permutation and combination calculations. No signup required.
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About Factorial Calculator
Free online factorial calculator. Calculate the factorial (n!) of any positive integer. Great for math learning, permutation and combination calculations. No signup required.
FAQ
What is a factorial?
Factorial, denoted n!, equals 1×2×3×...×n. For example: 5! = 5×4×3×2×1 = 120. By convention, 0! = 1.
What are factorials used for?
Factorials are widely used in permutations and combinations, probability theory, Taylor series, and algorithm complexity analysis.
How large a factorial can I calculate?
This tool supports 0 to 1000. Results beyond 170! are extremely large but can be precisely calculated using BigInt.