Using the Excel SQRT Function
Summary
The Excel SQRT function returns the positive square root of a number.Syntax
=SQRT (number)Syntax Breakdown
numberThe number argument is required in the SQRT function and is the number for which you would like to find the square root.
Usage Notes
The SQRT function returns the positive square root of a number. If the number argument is negative, the function returns the #NUM! error. If you must find the square root of a negative number you can wrap the number argument in the ABS function. For example, =SQRT(ABS(A1)) assuming cell A1 contains the negative number for which you want to find the square root.