Engineering

IMPRODUCT Function in Excel

Returns the product of complex numbers.

Syntax

  • =IMPRODUCT(inumber1, [inumber2], ...)

Arguments

  • inumber1 (required): First complex number
  • inumber2 (optional): Additional complex numbers

Examples

  • =IMPRODUCT("3+4i", "5-3i") - Multiply complex numbers - Result: 27+11i

IMPRODUCT in technical sheets

  • Document units in adjacent cells — many engineering functions require exact unit strings.
  • Use [CONVERT](/functions/convert/) for unit changes before specialized formulas.
  • Validate inputs with [ISNUMBER](/functions/isnumber/) and range checks.

Common errors

  • #NUM! if not valid complex numbers

Use cases

  • Complex multiplication
  • Engineering
  • Signal processing

Frequently asked questions

  • What is the IMPRODUCT function in Excel? IMPRODUCT returns the product of complex numbers. The syntax is =IMPRODUCT(inumber1, [inumber2], ...). Typical use cases include complex multiplication, engineering, signal processing.
  • How do I use the IMPRODUCT function? To use IMPRODUCT, type =IMPRODUCT( in a cell and provide the required arguments. Excel will show you the syntax and parameter hints as you type. Make sure to close the parentheses and press Enter to execute the function.
  • Why is IMPRODUCT not working in my Excel? Common issues with IMPRODUCT include #NUM! if not valid complex numbers. Start by checking the syntax =IMPRODUCT(inumber1, [inumber2], ...), then verify each referenced cell or range.

Editorial review

  • Reviewed by Excel.Directory Editorial Team. Updated May 2026.