By Zencalcy Editorial TeamLast reviewed About us
Compute n! = 1 × 2 × … × n instantly. Factorials explode in size (10! is already 3,628,800), so results use thousands separators; inputs are capped at 170, the largest factorial a standard number can hold.
n! for whole numbers 0–170 with readable thousands separators.
n! = 1 × 2 × … × n, with 0! = 1
| Symbol | Meaning |
|---|---|
| n | Whole number 0–170 |
5! = 120, 0! = 1 by definition, and 10! = 3,628,800.
Continue with the Percentage Calculator, all math calculators, or browse the full calculator directory.
By definition (the empty product), which keeps combinatorics formulas like nCr consistent.
Click to use the Absolute Value Calculator and get instant results.
Click to use the Basic Calculator and get instant results.
Click to use the Scientific Calculator and get instant results.
Click to use the Exponent Calculator and get instant results.
Click to use the Square Root Calculator and get instant results.
Click to use the Cube Root Calculator and get instant results.
Content updated: September 2026