Mesh Volume Calculator is a Blender add-on built around a single job: measuring the volume, area, or length of mesh objects inside a collection. Once the calculation runs, the results export to a CSV file rather than staying inside Blender.
Because CSV is a widely read format, those exported files open in Microsoft Excel, LibreOffice Calc, or other Excel-compatible spreadsheet software. From there the figures can feed into further work, which makes the add-on suited to tasks such as building material cost calculations or other projects that call for quick measurements of volume, area, or length.
The add-on covers a long list of Blender versions, from the 2.8x and 2.9x series through the 3.x line and on to 4.0, 4.1, 4.2 and 4.5. It is released under the GPL license. Version 1.0.1 followed the initial 1.0.0 release, correcting a calculation error that occurred when multiple objects shared a single collection.