ExcelExchange allows transferring of data between GRAMS/AI spectral data files (in SPC format) and Microsoft Excel worksheets. Data can be transferred in both directions: from an SPC file into a worksheet or from a worksheet into an SPC file. A simple-to-use wizard guides the whole process. ExcelExchange can import and export SPC files that contain single spectra. It also works with SPC multifiles where the sub-spectra share a common set of x-axis values. ExcelExchange is an effective way to import ASCII data sets with a large number of data points into GRAMS/AI and to export multi-dimensional spectral data sets into Excel for special calculations.