Enla, engineer's Length and Area add-in.

Select lines, polylines, circles or hatches in Autodesk® AutoCAD® and have their length and area values in a list. You can also select solids, and have their volume or centroid.


Basic use:

  • select, copy, zoom
  • check values, to find the object you need
  • insert into drawing, as MText, Text or (dynamic) Block
  • export to TXT, CSV, or JSON

And of that will cover most of your daily needs.


Advanced use

  • use formula field to evaluate values received from objects with your own custom math expressions
  • insert as combined text, next to each object, or pick location
  • insert (dynamic) blocks, with attributes filled with result of functions
  • override block position to match results of math expression
  • override dynamic block properties such as flip parameters or visibility to match result of expressions


To evaluate objects, use standard math expressions in formula tab with optional Enla variables, read directly from selected object:

variable description
L length
A area
V volume
tag custom text tag, saved to object in drawing
n position of object within list
cc incremental value, number of clicks on cumulative button
start start point of line, polyline or similar
end end point
center center point of any object
centroid centroid point, if available


or group variables (for aplicable functions)

group variable description
Lt total length of all objects
Ls length of objects selected in list
At total area of all objects
As area of objects selected in list


Functions are standard math or logic functions, with introduction of a few special

function name description

group function, returns array of results of previous function

Important: to avoid circular definitions, all functions are calculated from top to bottom for each function in sequence

x(), y(), z() get single value out of point (start, end...)
val("any text")  evaluates text (usefull for custom vars, since they are all text)
text(num,"0#") apply custom formating, using custom strings



sum(Lt) sum of lengths of all objects
average(As) average area of objects selected in list
L * 100 / sum (Lt) percentage of length in relation to total length
L > average (Lt) 1 or 0, compare how individual L relates to the average length



  • if some function accepts two parameters, they must be separated properly with either ; or , sign, depending on your preset windows settings.
  • rembember the order of calculations (top to bottom, then left to right)
  • take care, double check results - it may be not what you need need, or it may be wrong all together


This add-in is the free version of Enla. You may use this add-in for a non-commercial purpose, or you should consider buying Enla.

Acerca de esta versión

Versión 3.2.0, 23/03/2021
Added latest support. No change in version number.

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  • Thanks v.2023
    varga tam | mayo 16, 2022 Descarga verificada (¿Qué es esto?)

    Hello Ljubo!
    I have been using your app for a long time.
    Unfortunately it does not work in version A2023.
    Will an update be expected sometime?



  • thanks
    Mohamed Awad | mayo 12, 2022 Descarga verificada (¿Qué es esto?)

    thank you very much 

  • Excellent! and when for cad2023?
    Wsc Wsc | abril 06, 2022 Descarga verificada (¿Qué es esto?)

    when for cad2023?.........................................................................

    Ljubomir Blanusa (Editor) | mayo 03, 2022

    Hi, thanks for your interest. I hope it will be soon, when I find the time needed. I apologize for not being already done.

  • Excellent
    ahmed ali hussein | diciembre 20, 2021 Descarga verificada (¿Qué es esto?)


  • Version
    Berkan Alper Kaya | julio 11, 2016 Descarga verificada (¿Qué es esto?)

    This add-on is very useful. I have looked up so many lisp, and-ons and those are not good as this one. Thank you so much about it. I just want to ask you a question about versions. I'm using student version right now. Is there any limitation student version according to full version.

  • Все здорово!
    Лев Громов | marzo 19, 2016 Descarga verificada (¿Qué es esto?)

    Единственное, что хотелось бы добавить, чтоб можно было удалять лишний выбранный объект; а так же при отмене выделения объектов, значения площадей сохранялись в приложении (к примеру, если что-то требуется изменить на чертеже в процессе выбора объектов)?!

    Ljubomir Blanusa (Editor) | marzo 21, 2016

    Thank you for your interest in ENLA. To my best undestanding of your question, I will say that ENLA will always follow active AutoCAD window selection. So, to deselect one object in a group of selected objects, click on the desired object in the main AutoCAD window (model space for example), while holding SHIFT key. Object will be removed from AutoCAD selection, and because of that - it will also disapear from ENLA window, unless it has "pin". If it has "pin", it will stay in list until you delete that object in the drawing itself, or until you remove that "pin". So, to be able to modify, select/deselect object and that this specific object is always shown in list - use "pin" on that object. Also, if you have more questions, you are welcome to use support e-mail. Thank you.

    Лев Громов | marzo 22, 2016

    Все понял! Спасибо!

  • ENLA
    Slaven Soldo | enero 20, 2015 Descarga verificada (¿Qué es esto?)

    Simple but very helpfull app.

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