For most users, TLEN remains the best balance of simplicity and power. It is free, requires no installation beyond dragging a file, and does exactly one job efficiently.
If you spend your days in AutoCAD, you know the pain of repetitive tasks. Drawing a polyline to measure a length, manually editing text strings one by one, or calculating total areas across multiple objects—these tasks kill productivity.
In your drawing, select the objects you want to measure, type TLEN at the command line, and press Enter. AutoCAD will prompt you to select objects, then display the total length in a pop-up alert box. autocad tlenlsp download work
Once loaded, type the command defined in the LISP routine. For most versions of this routine, the command is: . Press Enter. Step 3: Selecting Objects AutoCAD will prompt you to "Select objects".
: Lines, Polylines ( LWPOLYLINE / POLYLINE ), Arcs, Circles, Splines, and Ellipses. For most users, TLEN remains the best balance
TLEN.lsp is an AutoLISP script designed to calculate the total length of multiple selected objects simultaneously. While modern versions of AutoCAD (2024 and later) and AutoCAD LT have improved internal measurement tools, many professionals still rely on this lightweight script for its speed and simplicity. It is widely used in industries like irrigation, electrical wiring, and pipeline design to quantify materials quickly. How to Download TLEN.lsp
If you prefer a professionally maintained version, some developers offer enhanced TLEN scripts (sometimes named tlen.lsp or linelengths.lsp ) with additional features like export to CSV or better handling of blocks. These are available on marketplaces such as TapWorks BOOTH. While the original TLEN is free, paid versions may include support and regular updates. Drawing a polyline to measure a length, manually
Autodesk now offers an “AutoLISP Download” section.