Returns the square root of (number * pi).
Syntax
SQRTPI(number)
Number is the number by which pi is multiplied.
Remark
If number < 0, SQRTPI returns the #NUM! error value.
Example
The example may be easier to understand if you copy it to a blank worksheet.
How to copy an example
 Create a blank workbook or worksheet.
 Select the example in the Help topic.
Note Do not select the row or column headers.
Selecting an example from Help
 Press CTRL+C.
 In the worksheet, select cell A1, and press CTRL+V.
 To switch between viewing the results and viewing the formulas that return the results, press CTRL+` (grave accent), or on the Formulas tab, in the Formula Auditing group, click the Show Formulas button.

A 
B 
Formula 
Description (Result) 
=SQRTPI(1) 
Square root of pi (1.772454) 
=SQRTPI(2) 
Square root of 2 * pi (2.506628) 
