FACT function

This article describes the formula syntax and usage of the FACT function in Microsoft Excel.

Description

Returns the factorial of a number. The factorial of a number is equal to 1*2*3*...* number.

Syntax

FACT(number)

The FACT function syntax has the following arguments:

  • Number    Required. The nonnegative number for which you want the factorial. If number is not an integer, it is truncated.

Example

Copy the example data in the following table, and paste it in cell A1 of a new Excel worksheet. For formulas to show results, select them, press F2, and then press Enter. If you need to, you can adjust the column widths to see all the data.

Formula

Description

Result

=FACT(5)

Factorial of 5, or 1*2*3*4*5

120

=FACT(1.9)

Factorial of the integer of 1.9

1

=FACT(0)

Factorial of 0

1

=FACT(-1)

Factorial of a negative number returns an error value

#NUM!

=FACT(1)

Factorial of 1

1

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