AutoCAD LT vs AutoCAD: what is the difference?

AutoCAD LT is the 2D version; the full AutoCAD adds 3D, automation and industry-specific toolsets.

Both programs come from Autodesk, use the same DWG drawing format and have identical 2D drafting tools. The difference lies in what sits on top of that 2D foundation. AutoCAD LT stops at drawing and documenting in two dimensions. Full AutoCAD adds 3D modelling, programmable automation (AutoLISP, .NET and more) and seven specialised toolsets.

If you only create flat drawings, floor plans, details, schematics, LT is plenty. As soon as you build 3D models, want to automate repetitive work or need an industry-specific toolset, you arrive at the full version. Below, we compare the two point by point.

The name LT historically stands for "Light", but that does not refer to drawing quality. In 2D, LT is not a stripped-down version: you get exactly the same drawing, dimensioning and layout tools as in full AutoCAD. The "light" part is purely what is missing on top of that 2D work, namely 3D, programmable automation and the toolsets. Once you understand that distinction, you rarely choose wrong.

This table sets out the main differences between AutoCAD LT and AutoCAD.

The table reveals the common thread: the rows where LT scores "no" are invariably about functions on top of 2D drafting. In the first rows, the actual drawing and documentation, both score "yes". If you do not use those lower blocks (3D, .NET, Express Tools, toolsets), with the full version you pay for capabilities that remain unused.

Only full AutoCAD can create and render 3D models.

This is the biggest difference. Full AutoCAD has a complete 3D toolset: you build 3D solids, surfaces and mesh models, edit them with commands such as EXTRUDE, REVOLVE, SWEEP and LOFT, and apply materials, lights and cameras for a rendered image. With UNION, SUBTRACT and INTERSECT you combine solids into complex forms, and with the gizmos you move, rotate and scale in all three axes.

In addition to creating geometry, the full version has visual styles (wireframe, conceptual, realistic), section planes to cut a model open, and the ability to automatically derive 2D views and sections from a 3D model. For mechanical or architectural design that is a major advantage, because your drawing and model remain linked.

AutoCAD LT can open and view a 3D model created in the full version, but not modify, move or create it. You also only process point clouds from a 3D scan (for example for renovation surveys) in the full version. If you work exclusively in 2D, you miss nothing here. If your work revolves around 3D design or visualisation, LT is not an option. Those doing heavier 3D or rendering work often also look at Inventor, Revit or 3ds Max, which are more focused on mechanical, construction and visualisation respectively.

Full AutoCAD supports AutoLISP, .NET and more for automation.

Repetitive drawing work can be automated with scripts and programming interfaces. The versions have recently moved closer together here, but a clear difference remains.

Since AutoCAD LT 2024, you can run existing AutoLISP routines and scripts (SCRIPT) in LT. That was exclusive to the full version for years. What LT still lacks:

• .NET, ObjectARX and VBA: the programming environments developers use to build complete plugins.
• Custom add-ins from the Autodesk App Store that rely on those APIs.
• Action Recorder to record and play back actions.

Full AutoCAD supports all these interfaces and the Express Tools, a collection of extra commands for text, blocks and layers. If your office runs on in-house LISP programs or third-party plugins, the full version is practically essential. How to take such settings with you when moving is explained in the article about moving an Autodesk licence to a new PC.

Some of that manual work can be handled in LT without programming, by the way. The Block Editor for building dynamic blocks is also in LT. With it you create parametric symbols (for example a door that changes width or a block with multiple visibility states) that you can adjust using grips. For a lot of standardisation, that is enough, without a single line of code.

Automation is not just a luxury for large firms. A LISP routine that creates standard layers, adds hatching or fills in a title block saves minutes on every drawing. Across hundreds of drawings per year that adds up. The question is therefore not whether automation is useful, but whether your LISP routines run in LT (running them: yes) or whether you also need to develop and distribute your own tools (then the full version). For ready-made routines you download from the internet, LT since version 2024 is often enough.

The specialised toolsets are only included with full AutoCAD.

Autodesk sells full AutoCAD as a package that brings together the toolsets, the web and mobile apps and cloud storage under one subscription. That package gives access to seven industry-specific toolsets at no extra cost. Each toolset adds libraries, objects and automation for a discipline:

AutoCAD LT has none of the toolsets. If you work in construction, building services or mechanical engineering and use those intelligent objects, the full version is the logical choice.

The value of the toolsets is in time saved. Instead of drawing every wall, duct or symbol individually, you place intelligent objects that know what they are and automatically update schedules, schematics and views. For an architectural or building services practice, that can easily pay back the difference between LT and the full version, because the toolsets as separate packages together would be far more expensive than the premium of the full subscription.

Both versions share 2D drafting, the DWG format and the web and mobile apps.

The differences get a lot of attention, but the similarities are substantial. For pure 2D work, LT feels exactly like full AutoCAD. Both versions offer:

• The same 2D drawing tools: lines, polylines, hatching, dimensioning, text and tables.
• Layers, blocks, external references (xrefs) and dynamic blocks.
• Layouts, viewports and plotting to PDF or printer.
• The TrustedDWG format, so files are fully interchangeable between the two.
• The AutoCAD web app and mobile app for opening drawings outside the office.
• Recent smart features such as counting blocks (COUNT) and Smart Blocks.

The annotation tools are also identical. How to get text heights and symbols correct at different scales is explained in the guide to setting the annotation scale in AutoCAD, and it works identically in both versions.

They are also level on collaboration. Both versions connect to Autodesk Docs for shared drawings in the cloud, and DWG COMPARE lets you place two versions of a drawing side by side to see changes. The system requirements are comparable too, although heavy 3D work in the full version demands more from the graphics card than pure 2D drafting.

The interface, keyboard shortcuts and command line are also virtually the same in both versions. Anyone moving from LT to full AutoCAD therefore does not need to relearn the drawing work itself; they simply gain extra features. In the other direction, LT feels immediately familiar to an experienced AutoCAD user, with the only difference being that the 3D, API and toolset commands are missing.

AutoCAD LT costs about a quarter of full AutoCAD.

Price is the deciding factor for many users. The ratio has been stable for years: full AutoCAD costs about four times as much as AutoCAD LT. In euros, LT is in the range of a few hundred euros per year and the full version around two thousand euros per year. The exact amounts change per year and per sales channel.

Both are sold only as a subscription (named user), with a term of one month, one year or three years. Autodesk no longer sells a separate perpetual licence. A three-year subscription is cheaper per year than renewing monthly. To understand what that difference means, read the comparison perpetual versus subscription.

Students and educators can get a free education licence of full AutoCAD (including toolsets) for one year from Autodesk, renewable as long as you meet the conditions. That licence is for learning, not commercial work. For students, the full version is therefore often more accessible than paid LT, precisely because the free education version includes the complete feature set.

With the full version, factor in the seven toolsets if you use them: as separate packages they would together be far more expensive, so for an architectural or building services practice the premium can quickly pay for itself.

If you use AutoCAD only occasionally, there is a third route: Flex, Autodesk's pay-as-you-go model. You buy tokens in advance and pay per day of use. For a draughtsperson working in AutoCAD only a few days a month, that can work out cheaper than a fixed annual subscription. For daily use, a regular subscription is almost always better value.

Moving from AutoCAD LT to full AutoCAD is possible without losing your drawings.

If you start with LT and the work grows towards 3D or automation, the move is simple. Because both versions use the same DWG format, all your files remain usable; no conversion is needed. You change your subscription to full AutoCAD and install it alongside or instead of LT.

What moves with you and what to watch:

• Drawings: fully compatible, open unchanged.
• Templates (.dwt), line types and plot styles: simply reusable.
• Custom settings and menus: export your user profile or take your CUIx customisations with you.
• LISP routines: run in the full version by default; in LT they can only be run.

The learning curve is small: 2D drafting is identical, you simply gain features. Going the other way, downgrading from the full version to LT, is also possible, but then you lose access to 3D, the APIs and the toolsets in your new drawings.

Choose AutoCAD LT for pure 2D work and full AutoCAD for 3D or automation.

The choice becomes simple if you ask yourself three questions:

1. Do I create or edit 3D models or renders? If yes, you need full AutoCAD. If no, LT will do.
2. Do I use plugins, .NET tools or a specialised toolset? If yes, choose the full version. LT does not support them.
3. Is price the deciding factor and do I only work in 2D? Then LT is the economical choice with exactly the same drawing tools.

A few concrete profiles make it tangible:

• Freelance architectural draughtsperson, 2D only: AutoCAD LT. All drawing tools are present, at the lowest price.
• Building services practice with duct and pipe schematics: full AutoCAD, because of the MEP and Electrical toolsets.
• Mechanical engineer who models 3D parts: full AutoCAD, or Inventor if it is purely mechanical design.
• Office with in-house LISP or .NET tools: full AutoCAD, because LT does not develop or distribute its own plugins.

To summarise: draughtspeople who produce floor plans, details and schematics are well served, and cost-effectively, by AutoCAD LT. Designers who work in 3D, automate drafting or use discipline-specific objects need full AutoCAD. If in doubt, check the official Autodesk feature comparison to see the latest state per version.