Raise a number to a fraction to find the square or third root

Photo of Bill Jelen By Bill Jelen

Bill Jelen is the author of 24 books on Microsoft Office Excel. He is a regular guest on TechTV with Leo Laporte and the host of MrExcel.com, which includes more than 300,000 questions and answers about Excel.

Excel offers a SQRT function to find the square root of a number. But what if you need to figure out the third root or the fourth root of a number? In this article, you'll learn how to raise a number to a fraction to find a root. For example, to find the cube root of a number, you can raise the number to the 1/3 power.

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This article is an excerpt from Learn Excel 97-2007 from MrExcel by Bill Jelen. Buy the print edition or download a free e-book edition from MrExcel.com.

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Applies To: Excel 2007

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