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Total Area Autocad Lisp Hot! (2026)

(defun C:AT ( / ss area_list total sf) (setq sf (getreal "\nConversion factor (1 drawing unit = ? feet): ")) (if (= sf nil) (setq sf 1.0)) (setq ss (ssget '((0 . "LWPOLYLINE,POLYLINE,CIRCLE,ELLIPSE,REGION")))) (if ss (progn (setq total 0.0) (repeat (setq i (sslength ss)) (setq ent (ssname ss (setq i (1- i)))) (setq area (vlax-curve-getArea ent)) (setq total (+ total area)) ) (setq total_sqft (* total sf sf)) (setq total_acres (/ total_sqft 43560.0)) (alert (strcat "Total Area: " (rtos total_acres 2 2) " Acres")) ;; Optional: Insert text (command "_.MTEXT" (getpoint "\nPick text insertion point: ") "J" "TL" "W" "0" (strcat "TOTAL AREA = " (rtos total_acres 2 2) " ACRES") "") ) (princ "\nNo objects selected.") ) (princ) )

Calculating the cumulative area of multiple objects is one of the most common tasks in drafting, estimating, and spatial planning. While standard AutoCAD commands like AREA or MEASUREGEOM work well for single shapes, they quickly become tedious when dealing with dozens of complex zones.

The logic generally follows these steps:

Advanced scripts can detect a "hole" inside a larger polyline and subtract that area automatically. Common Troubleshooting Tips total area autocad lisp

;; Helper function to insert total area as text in drawing (defun insert-area-text (area / pt) (setq pt (getpoint "\nPick insertion point for text: ")) (if pt (entmake (list '(0 . "TEXT") '(100 . "AcDbEntity") '(100 . "AcDbText") (cons 10 pt) (cons 40 (getvar 'TEXTSIZE)) (cons 1 (strcat "Total Area: " (rtos area 2 2) " sq units")) '(50 . 0.0) '(7 . "Standard") '(72 . 0) '(73 . 0) ) ) ) )

;; Alternative: Quick total area with selection window (defun C:TAQ ( / ss total area obj) (setq ss (ssget '((0 . "CIRCLE,ARC,ELLIPSE,LWPOLYLINE,POLYLINE,REGION,HATCH")))) (setq total 0.0) (if ss (repeat (setq i (sslength ss)) (setq obj (vlax-ename->vla-object (ssname ss (setq i (1- i))))) (if (vlax-property-available-p obj "Area") (setq total (+ total (vla-get-area obj))) ) ) ) (princ (strcat "\nTotal Area = " (rtos total 2 2))) (princ) )

The program will calculate the total area of the drawing and print it to the command line. (defun C:AT ( / ss area_list total sf)

By adopting these tools, you're not just saving time—you're , creating a foundation for increased accuracy, efficiency, and automation that will make you a more effective and valuable CAD professional.

Before we dive into writing a Lisp program to calculate total area, let's cover some basic concepts of Lisp:

An AutoCAD LISP routine is a small, specialized program designed to perform a specific task within the CAD environment. A "Total Area" LISP allows users to: While standard AutoCAD commands like AREA or MEASUREGEOM

(defun c:total-area () (setq total-area 0) (setq ss (ssget "X")) (setq i 0) (while (< i (sslength ss)) (setq ent (ssname ss i)) (setq area (cdr (assoc 42 (entget ent)))) (setq total-area (+ total-area area)) (setq i (1+ i)) ) (princ "Total Area: ") (princ total-area) (princ) )

multiple closed objects (polylines, circles, regions) simultaneously. Calculate the individual area of each selected object. Sum all individual areas to produce a final, precise total. Display or write the results on the screen or in a table. Why Use LISP for Area Calculations?