You select multiple objects (lines, polylines, arcs, circles, or splines), run the TLEN command, and AutoCAD instantly displays the sum of all their lengths in the command line.
Introduction: The Frustration of Measuring Multiple Lines in AutoCAD If you are an architect, civil engineer, or CAD drafter, you know the pain. You have a complex floor plan with dozens of polylines representing cable trays, piping routes, or boundary walls. You need the total length of all these lines—not the length of each individual segment.
Enter – a legendary, lightweight AutoLISP routine that has been saving hours of manual calculation for drafters since the early 2000s. But where do you find the best and safest version to download? How do you install it? And are there modern alternatives? autocad tlenlsp download best
The native MEASUREGEOM or LIST commands in AutoCAD are powerful, but they fail at one simple task:
This article answers all those questions and provides the definitive guide to the . What is TLEN.lsp? (And Why You Need It) TLEN.lsp (Total LENgth) is a custom AutoLISP script created by CAD guru Kenny Ramage . When loaded into AutoCAD, it introduces a new command: TLEN . You need the total length of all these
(defun C:SUM () (C:TLEN)) Now you can type SUM instead of TLEN . Use this modified version (available on GitHub) that writes the total to a CSV file:
;; After calculating, write to file (setq file (open "C:\\temp\\lengths.csv" "a")) (write-line (rtos total) file) (close file) Use TLEN to verify totals before inserting an AutoCAD Field that auto-updates the length sum in a title block. Legal & Ethical Downloading Is TLEN.lsp free? Yes. Kenny Ramage released it into the public domain circa 1999. There is no license, no payment, no registration. How do you install it
You are calculating the total length of HVAC ductwork represented by 35 individual red lines on a mechanical plan.