Exceljet

Quick, clean, and to the point

Square root of number

Excel formula: Square root of number
Generic formula 
=SQRT(number)
Explanation 

To get the square root of a number, you can use the SQRT function. In the example shown, the formula in C5 is:

=SQRT(B5)

How this function works

The SQRT function is fully automatic and will return the square root of any positive number. If for some reason you need to get the square root of a negative number (i.e. treat the negative number like a positive number) you can wrap the number in the ABS function like this:

=SQRT(ABS(A1))

Square root with POWER function

You can get the square root with the POWER function by using 1/2 as the power argument:

=POWER(A1,1/2)

Square root of number with POWER function

Square root with exponent operator

You can get the square root without any functions, using the caret (^) with 1/2 as the exponent:

=A1^(1/2)

Square root of number with exponent

Author 
Dave Bruns

Excel Formula Training

Formulas are the key to getting things done in Excel. In this accelerated training, you'll learn how to use formulas to manipulate text, work with dates and times, lookup values with VLOOKUP and INDEX & MATCH, count and sum with criteria, dynamically rank values, and create dynamic ranges. You'll also learn how to troubleshoot, trace errors, and fix problems. Instant access. See details here.