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


Returns a random integer number between the numbers you specify. A new random integer number is returned every time the worksheet is calculated.


RANDBETWEEN(bottom, top)

The RANDBETWEEN function syntax has the following arguments:

  • Bottom    Required. The smallest integer RANDBETWEEN will return.

  • Top    Required. The largest integer RANDBETWEEN will return.


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.





Random number between 1 and 100 (varies)



Random number between -1 and 1 (varies)


Note: When a worksheet is recalculated by entering a formula or data in a different cell, or by manually recalculating (press F9), a new random number is generated for any formula that uses the RANDBETWEEN function.

Applies To: Excel 2016, Excel 2010, Excel Starter, Excel 2013, Excel Online, Excel 2016 for Mac, Excel for Mac 2011, Excel 2007

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