This AutoCAD LISP script calculates the combined area of multiple selected closed polylines, streamlining manual quantity take-offs. The TOTALAREA utility is a lightweight AutoLISP routine designed to automate the calculation of surface areas within AutoCAD environments. By identifying and processing multiple closed polylines simultaneously, the script eliminates the need for manual selection or repetitive command inputs. It extracts geometry data directly from the CAD file, aggregating the individual area values into a single, reliable total. This tool is built for efficiency, handling complex selections with ease to ensure that total square footage is derived accurately without disrupting the existing drawing structure or modifying the underlying geometry of the project.

The download is a single file containing .LSP files.

To implement this script, load the LSP file into the AutoCAD environment using the APPLOAD command. Once active, run the defined command to initiate the selection process. Users select the desired closed polylines, and the routine automatically processes the geometry to report the cumulative area in the command line or a dialog box. It is recommended to verify that all target polylines are closed to prevent calculation errors during the summation of areas within the active drawing session.

This script is essential for architects, landscape designers, and quantity surveyors performing rapid site analysis or material estimations. It is particularly useful during early design stages, master planning, or when preparing detailed cost schedules for flooring, paving, or green roof areas. By integrating this tool into daily CAD workflows, professionals can significantly reduce the time spent on manual quantity take-offs. It pairs effectively with standard AutoCAD drafting practices, ensuring that area reporting remains consistent across residential, commercial, and large-scale urban development projects.