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How to Use Excel IMSUB Function?

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IMSUB Function in Excel: Microsoft Excel is a powerful data visualization and analysis program used all around the world. It uses spreadsheets to store, organize, or perform operations with formulas and functions. If you want to get the difference between two complex numbers, you can use the IMSUB function.

In this tutorial, We will guide you to know the usage of the IMSUB Function in Excel with its syntax, description, and examples. Get an official version of MS Excel from the following link:

Excel IMSUB FunctionPin
Excel IMSUB Function

Description of IMSUB Function

  • IMSUM function returns the difference between two complex numbers.
  • The complex number is in the form of X+Yi or X+Yj.
  • Where X and Y are real numbers, and i or j is an imaginary number.
  • X is a real part, Yi is an imaginary part.
  • The sample complex numbers are 2+3i and 4-2i.


  • Here, you will see the syntax of the IMSUB function.
  • To apply this function on your spreadsheet, you must select a cell and enter the formula in the following format.
  • Once you enter the formula, click the Enter button to get the result.

=IMSUB(inumber1, inumber2)

Argument Explanation:

  • Inumber 1 and Inumber 2 – Both are complex numbers.

1) The difference between two complex numbers is calculated as follows.
2) “( a+bi ) – ( c+di ) = ( a – c ) + ( b – d )i”
3) You can use a COMPLEX Function to convert real and imaginary coefficients to a complex number.


Let’s see an example to know how the IMSUB function works in the worksheet.

  • Initially, you have to open your Excel workbook on your PC and launch the worksheet with data.
  • For instance, we have given the input values in the range B3:C6. And we will get the difference between given values using the IMSUB function.
Input RangePin
Input Range
  • Then, you have to enter the formula in the cell as shown below to get the result.
Enter the formulaPin
Enter the formula
  • After entering the formula, you need to click the Enter button to get the output.
Output ValuePin
Output Value
  • Once you get the output for the first cell, then you can drag down the cell to the below to get the result of the remaining cells.
Drag down the cellPin
Drag down the cell


In this tutorial, we guided you to learn the usage of the IMSUB Function in Excel with its syntax, description, and examples. Kindly give your feedback in the comment section. To learn more about Excel functions, then visit our webpage,

Video Tutorial

The following video will show you how to apply the IMSUB function in the worksheet.

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