Proof-of-concept Calc add-in that provides a basic set of spreadsheet functions for manipulating scientific measurements, tracking units of measure and uncertainty.
This proof-of-concept Calc add-in provides a basic set of spreadsheet functions for manipulating scientific measurements, tracking units of measure and uncertainty (input and displayed as significant figures, but tracked as an arbitrary floating-point number internally). Usage instructions and further information are on the extension page on my web site. Depending on your OS distribution, you may need to install an additional package to get the unoil.jar file that is necessary to successfully install the extension.
Though the release is from 2009, I tested it in libreoffice-calc-188.8.131.52-1.fc32.x86_64 in Fedora 32 on 2020-08-30 and it still worked after 11 years. (Kudos to LibreOffice and Java for backward compatibility.) I don't plan to make another release just for the sake of having a newer release, but I'll consider making enhancements if users express significant demand.