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Editorial Team
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Asked: 2026-05-24T03:36:22+00:00

I am trying to compute the cube root of a negative number in VBA

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I am trying to compute the cube root of a negative number in VBA for Excel. Taking the cube root of a negative number in an Excel worksheet works fine:

=(-2)^(1/3)
-1.25992

However the same concept coded into VBA:

(-2)^(1/3)

gives a #VALUE!error when returning the value to the worksheet. I suspect VBA is parsing the 1/3 to its decimal representation 0.3333... and therefore causing a mathematical error since negative numbers can’t be raised to non-integer powers in the real domain. Is there a workaround?

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1 Answer

  1. Editorial Team

    Try using the POWER() function:

    POWER(-2, 1/3)
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