RCalc-GD
RCalc-GD is an editor plugin for Godot 4.2. Download and enable it to add an RCalc pane to the editor (It defaults to the top left, next to the Scene and Import panes).
You can type \help
to open a help window, describing how to use RCalc, and listing all commands, operators, and units supported.
For more information about RCalc, see the GitHub repo.
This plugin relies on the GDExtension Bindings for RCalc.