IMSUM Function in LibreOffice Calc — Tested Examples
An explanation of LibreOffice Calc IMSUM, including tested formulas, examples, expected results and common mistakes.
Tested: Examples checked in LibreOffice Calc 25.2.3.2. What this means
Returns the sum of complex numbers. Add real parts separately from imaginary parts: (1+2i)+(3+4i) is 4+6i.
Syntax and arguments
=IMSUM(Complex_number; Complex_number)
LibreOffice Calc formulas generally separate arguments with semicolons (;).
| Argument | Explanation |
|---|---|
Complex number |
The complex number |
Complex number |
The complex number (optional) |
Worked examples
Example 1: Add two complex values
=IMSUM("1+2i";"3+4i")
Expected result: 4+6i. This value was returned in the LibreOffice Calc 25.2 test.
How to interpret the result
Add real parts separately from imaginary parts: (1+2i)+(3+4i) is 4+6i.
Mistakes and troubleshooting
- Check inputs and assumptions: Do not convert the complex-text result to an ordinary real number without selecting a component.
- Check argument order and format: Strings go in quotes, cell references do not. Functions that return arrays may require special entry.
- Verify your own data: Reproduce the example first. If your formula returns an error, inspect the referenced cells and individual argument values.
Related functions
Tested version and primary reference
1 example(s) on this page passed real calculations in LibreOffice Calc 25.2.3.2. This is not a claim about every possible input or other spreadsheet applications.