IMSUM function

This article describes the formula syntax and usage of the IMSUM function in Microsoft Excel.


Returns the sum of two or more complex numbers in x + yi or x + yj text format.


IMSUM(inumber1, [inumber2], ...)

The IMSUM function syntax has the following arguments:

  • Inumber1, [inumber2], ...    Inumber1 is required, subsequent numbers are not. 1 to 255 complex numbers to add.


  • Use COMPLEX to convert real and imaginary coefficients into a complex number.

  • The sum of two complex numbers is:



Copy the example data in the following table, and paste it in cell A1 of a new Excel worksheet. For formulas to show results, select them, press F2, and then press Enter. If you need to, you can adjust the column widths to see all the data.





Sum of two complex numbers


Applies To: Excel 2016, Excel 2013, Excel 2010, Excel 2007, Excel 2016 for Mac, Excel for Mac 2011, Excel Online, Excel for iPad, Excel for iPhone, Excel for Android tablets, Excel Starter, Excel for Android phones

Was this information helpful?

Yes No

How can we improve it?

255 characters remaining

To protect your privacy, please do not include contact information in your feedback. Review our privacy policy.

Thank you for your feedback!

Change language