TLEN.lsp is an AutoLISP routine created by Lee Mac (or often attributed to him and other CAD developers). It serves a single, vital purpose: calculating the cumulative length of selected objects in an AutoCAD drawing.
Before jumping into the download process, let's understand why this simple tool is invaluable.
is a custom macro written in AutoLISP, the native programming language of AutoCAD.
(Total Length) is a popular, free AutoLISP script used in AutoCAD to calculate the combined length of multiple selected objects, such as lines, polylines, arcs, and circles
This routine is an absolute necessity for professionals involved in quantity surveying and material estimations. It allows you to quickly calculate:
As TlenLSP is a legacy tool often shared within the CAD community, it is typically distributed as freeware or shareware on Lisp repositories.
Tlenlsp automates repetitive tasks such as scaling multiple objects, reordering text, or connecting lines. Commands that usually take five or six steps can be executed in one. 2. Specialized Command Set
Manually calculating total lengths in AutoCAD is slow and causes mistakes.
If you cannot get TLEN to work or want more features, consider these alternatives.
To avoid reloading every time you restart AutoCAD:
As a widely shared community-developed routine, it is available without cost. How to Download TlenLSP Free