Factorial Calculator
Calculate the factorial of a number. Supports large numbers.
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Enter a non-negative integer (0-170)
Scientific Notation
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Number Info
Digits: -
Trailing zeros: -
Trailing zeros: -
Calculation Breakdown
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Factorial Reference Table
| n | n! | Digits |
|---|---|---|
| 0 | 1 | 1 |
| 1 | 1 | 1 |
| 5 | 120 | 3 |
| 10 | 3,628,800 | 7 |
| 15 | 1,307,674,368,000 | 13 |
| 20 | 2,432,902,008,176,640,000 | 19 |
What is a Factorial?
The factorial of a non-negative integer n (written as n!) is the product of all positive integers less than or equal to n.
n! = n × (n-1) × (n-2) × ... × 3 × 2 × 1