Excel formula: Cube root of number

Generic formula

=number^(1/3)

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 C5 is:

=B5^(1/3)

How this function works

The cube root of a number can be calculated by raising a number to the (1/3). Be sure to wrap the fraction in parentheses.

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

With the POWER function

The POWER function can also be used to calculate a cube root of a number by supplying 1/3 as the power argument.

=POWER(A1,1/3)

Author

Dave Bruns

Related formulas

Square root of number

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...

nth root of number

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...

Related functions

Excel POWER Function

The Excel POWER function returns a number to a given power. The POWER function works like an exponent in a standard math equation.

Good links

Rational exponents and radicals (Kahn Academy)

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