This simple tool is to measure the nutritional value of a meal and provides a gentle introduction to the HGSFP web application. This tool can be used without an Internet connection. The tool should run on most versions of Microsoft Excel for Windows. On opening the file, Excel may prompt you to ‘enable content’ or to ‘enable macros’; please select ‘yes’ or ‘ok’. This tool has been developed so that users can interact with virtually any cell that is a shade of blue.