To use CalcsCAD, you must have:
The CalcsCAD plugin is currently in closed testing. To get access to the plugin for AutoCAD or BricsCAD, please send a request to help@clearcalcs.com and we will send a copy of the installation files.
Unzip the ClearCalcs.Bundle folder into your Application Plugins folder (for example: C:\Users\{YOURUSERNAME}\AppData\Roaming\Autodesk\ApplicationPlugins(if you cannot see the AppData or Roaming folder you may need to enable showing hidden folders.
The next time you run AutoCAD you will be prompted to allow the ClearCalcs plugin to run, once you approve this, the toolbar will appear in new drawings.
Unzip the BricsCAD install file and run the installer. The next time you open BriscsCAD, the new ClearCalcs toolbar should appear.