The enclosed file with documentation is an updated version of a simple cyclic voltammetry (CV) simulator written in Microsoft Excel. The spreadsheet supports up to three chemical species that can undergo up to four redox processes each. The calculations assume that the first process is an electron transfer. Experimental CVs containing up to 10,000 data points in text format can be copied/pasted into the spreadsheet for comparison to the simulation. The spreadsheet can be operated in protected mode or unprotected and modified as needed. The spreadsheet is provided with no guarantee and it may not be suitable for all applications. System requirements: Microsoft Windows 8.1 Office software or later. New version (v_24) uploaded to the ACS Network on 8/26/21.