The calculation functions of Peptide Calculator and Peptoid Calculator can be used directly in Microsoft Excel spreadsheets, making calculation of properties for multiple sequences easy.
To use sequence calculations in Excel first download the Excel add-in here. Note that this may need to be unblocked before use by right-clicking on the file and choosing Properties > General > Unblock.
Install the add-in from within Excel using File > Options > Add-Ins and browsing to the downloaded file (further instructions can be found on the Office website).
The example spreadsheet available here illustrates use of the custom Excel functions to calculate peptide and peptoid properties. Please note that an internet connection is required to use the Excel add-in. Microsoft Office for Mac is not supported.
For a more detailed summary please see the API pages.