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


Need more help?

Expand your Office skills
Explore training
Got It
Get instant Excel help
Connect to an expert now
Subject to Got It terms and conditions

Was this information helpful?

Thank you for your feedback! It sounds like it might be helpful to connect you to one of our Office support agents.