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nth root of number

Excel formula: nth root of number
Generic formula 
=number^(1/n)
Explanation 

To get the cube root of a number, you can use the caret(^) operator with 1/3 as the exponent in a simple formula. In the example shown, the formula in D5 is:

=B5^(1/C5)

How this function works

By definition, the nth root of a number can be calculated by raising that number the power of 1/n. Exponents are entered using the caret (^) symbol, with a number on the left and power on the right. So, in this example we get the numbers from column B and powers from column C:

=B5^(1/C5)

If this idea is new to you, Khan Academy has good videos on the topic.

With the POWER function

The POWER function is another way to perform exponentiation in Excel.  Simply supply the number with 1/n for the power argument:

=POWER(number,1/n)

So for the example above, the formula in D5 would be:

=POWER(B5,1/C5)

 

Author 
Dave Bruns

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