What Is AutoCAD? Uses, Versions, and System Requirements

If you've ever wondered how architects draw building plans, how engineers design machine parts, or how solar installers lay out panels on a roof, there's a good chance the answer is AutoCAD.

This is the first post in our beginner series. By the end, you'll know what AutoCAD is, what it's used for, which version to choose, and whether your computer can run it.

What is AutoCAD?

AutoCAD is computer-aided design (CAD) software made by Autodesk. It lets you create precise 2D drawings and 3D models on a computer instead of drawing by hand on paper.

Think of it as a digital drafting table with unlimited accuracy. Every line has exact dimensions, every drawing can be edited in seconds, and the same file can be shared, printed, or reused on future projects.

AutoCAD first launched in 1982 and has remained an industry standard for over 40 years. Its native file format, DWG, is accepted almost everywhere in engineering and construction.

What does the AutoCAD screen look like?

Here is the AutoCAD workspace as it appears when you open a new, blank drawing. Don't worry about memorizing it yet. We'll go through each part in detail in the next posts.

The AutoCAD workspace (AutoCAD 2024 shown). Newer versions look very similar.

• Ribbon (top): tabs and panels holding the drawing and editing tools, such as Line, Circle, Move, and Copy.
• Drawing tabs: switch between open drawings.
• Properties palette (left): shows the color, layer, and linetype of whatever you select.
• Drawing area (center): the large dark canvas where you draw. The small X and Y marker shows the drawing's origin.
• ViewCube (top right): helps you change the viewing angle, mainly in 3D.
• Command line (bottom): where you can type any command, such as LINE or OFFSET.
• Model and Layout tabs, and status bar (bottom): switch between drawing and printing views, and toggle helpers like Ortho and Snap.

What is AutoCAD used for?

• Architecture: floor plans, elevations, sections, and site plans
• Civil engineering: road layouts, land surveys, drainage plans
• Mechanical engineering: machine parts and assembly drawings
• Electrical engineering: wiring layouts, panel schedules, and single-line diagrams
• Interior design: furniture layouts and space planning
• Solar design: roof layouts, array placement, site plans, and electrical diagrams (we'll cover this later in the series)

If your work involves drawings that must be accurate and shareable, AutoCAD is probably useful to you.

AutoCAD vs. AutoCAD LT: which one do you need?

Autodesk sells two main versions:

	AutoCAD	AutoCAD LT
2D drafting	Yes	Yes
Full 3D modeling	Yes	No
Industry toolsets	Yes (electrical, architecture, mechanical, etc.)	No
Customization and automation	Advanced	Limited
Price	Higher	Lower

Which should you pick? If you mainly draw floor plans, layouts, and diagrams in 2D, LT covers most of what you need. If you want 3D, specialized toolsets, or deeper customization, go with full AutoCAD. For this tutorial series, nearly everything works in both.

Which version should you learn on?

Autodesk releases a new version every year, named by year (AutoCAD 2026, 2027, and so on). The latest is AutoCAD 2027, which still saves in the same 2018 DWG format, so files stay compatible with earlier versions.

The good news for beginners is that the core tools (lines, circles, trim, layers, dimensions) have barely changed in decades. A tutorial written for one version works in nearly all the others. You don't need the newest release to learn.

AutoCAD system requirements

Requirements change between versions, so always confirm on Autodesk's official system requirements page before buying or installing. Here is what to know for AutoCAD 2027:

• Operating system: AutoCAD 2027 lists Windows 11 as its only supported Windows version. Earlier versions such as 2026 also supported Windows 10.
• Memory (RAM): the minimum is 16 GB, with 32 GB recommended. Some reseller pages still show older, lower numbers, so check Autodesk directly.
• Processor: a modern 64-bit processor at roughly 2.5 GHz or faster; 3 GHz or more is recommended.
• Graphics card: a DirectX 11 compatible GPU at minimum; a dedicated card with DirectX 12 support is better.
• Display: 1920 x 1080 with true color works fine, and 4K is supported.
• Storage: about 10 GB free space, ideally on an SSD.
• Mouse: a standard mouse with a scroll wheel. You'll use the wheel constantly to zoom and pan.

On a lower-spec or older computer? You have options. AutoCAD LT is lighter, older versions have lower requirements, and the browser-based AutoCAD Web app runs on almost any machine for basic drawing and editing.

Can you use AutoCAD on a Mac or phone?

Yes. AutoCAD has a Mac version, a web app, and a mobile app. Windows has the fullest feature set, and this series uses the Windows version in its examples. Most commands work the same on Mac.

Is AutoCAD free?

Not exactly, but you have ways to try it at no cost:

• Free trial: Autodesk offers a 30-day trial.
• Free educational license: students and educators can usually get a free license with a valid school email.
• AutoCAD Web: limited free access may be available for basic use.

We'll walk through the installation and the student license step by step in the next post.

Why learn AutoCAD in the first place?

• It's in demand. Many job listings for drafters, designers, and engineers ask for AutoCAD skills.
• It's transferable. The logic you learn carries over to other CAD tools.
• It saves time. Once you learn shortcuts and blocks, repetitive drawing work gets much faster.
• It opens doors in specialized fields like solar design, where accurate layouts directly affect system performance and permits.

What you'll learn in this series

1. Installing AutoCAD and exploring the interface
2. Drawing and editing basic shapes
3. Layers, blocks, text, and dimensions
4. Plotting your drawings to PDF
5. Real projects, including a floor plan and solar PV layouts and single-line diagrams

Quick recap

• AutoCAD is professional CAD software for precise 2D and 3D drawings.
• AutoCAD LT is the cheaper 2D-focused option, and full AutoCAD adds 3D and specialized tools.
• You don't need the latest version to learn.
• Check system requirements before installing, since the newest release needs Windows 11 and more RAM.
• Free trials and student licenses make it easy to start.

Up next

Next post: How to Install AutoCAD (and Get the Free Student License). Subscribe so you don't miss it, and get our free beginner shortcut cheat sheet when it launches.

Have a question about AutoCAD or solar design? Leave a comment below and we'll answer it in a future post.