AutoCAD

AutoCAD How to Change Units?

Changing Units in AutoCAD: A Step-by-Step Guide

Understanding Default Units in AutoCAD

AutoCAD predominantly uses inches as its default measurement unit. This means that when you enter a dimension, the software interprets it in inches. For instance, typing “6” is recognized as 6 inches, while the symbol “’” denotes feet. Notably, AutoCAD automatically converts 12 inches into 1 foot, providing flexibility in measurements.

How to Change Default Units in AutoCAD 2025

Switching the default units requires a few straightforward steps:

  1. Open AutoCAD: Start by launching AutoCAD 2025 and opening the desired drawing file.

  2. Access Options: Navigate to the Tools tab on the Ribbon, and find the Options panel.

  3. Go to Document Settings: Within the Options dialog, select the Document Settings section.

  4. Select Units Tab: Click on the Units tab to access the unit configuration options.

  5. Choose Desired Units: From the Length drop-down list, select your preferred unit type (e.g., inches, millimeters, centimeters).

  6. Apply Changes: Click OK to apply the new settings. All existing dimensions in the file will now display according to the chosen unit system.

Adjusting Units While Working on Your Drawing

If you need to change units mid-project, follow these steps:

  1. Open the Application Menu: Click on the Application button located at the upper left corner of the interface.

  2. Find the Units Option: Go to Drawing Utilities and select Units from the available options.

  3. Draw Units Dialog: This switch opens the Drawing Units dialog box.

  4. Choose Linear Unit Type: Select your desired unit type from the Length Type drop-down list.

  5. Select Representation Style: Pick a representation style that suits your project’s needs.

  6. Confirm Your Choice: Click OK to finalize the change.

Using the Zoom Command Effectively

The zoom functionality in AutoCAD allows you to manipulate the view of your drawing efficiently. Here’s how to use it:

  1. Window Zoom: Draw a rectangle around the area you want to focus on. AutoCAD will zoom into this section, filling the entire window.

  2. Zooming to Objects: Select specific objects if you want them displayed prominently. You can initiate the zoom command before or after selecting objects.

  3. Understanding Zoom Levels: By typing Z followed by Enter, you can adjust the zoom scale interactively.

Practical Usage of Limits and Zoom

After setting boundaries for your drawing, the next step is to zoom to those limits.

  1. Apply Limits Command: Set your desired drawing limits using the LIMIT command.

  2. Use the Zoom All Command: Immediately after setting limits, type ZA and press Enter. This action brings your zoomed area into view, showcasing the limits you have just established.

Resetting AutoCAD Settings

If you encounter any issues, resetting your AutoCAD settings may help:

  1. Open Preferences: Click on the AutoCAD menu and select Preferences from the dropdown.

  2. Navigate to Application Tab: Within the Preferences dialog, click on the Application tab.

  3. Reset Options: Press the Reset Application Options button and confirm by clicking Reset AutoCAD.

FAQ

How can I quickly toggle the command line in AutoCAD?
You can toggle the command line by pressing CTRL + 9 (or CMD + 3 for Mac users). This allows you to access command line functionalities easily.

What are the different dimension command types available in AutoCAD?
AutoCAD provides various dimension types including linear, radial, angular, ordinate, and arc length. You can use the DIM command to automatically dimension your objects based on their geometry.

How can I increase the drawing area in AutoCAD?
Maximize your drawing area by hiding unnecessary toolbars. You can do this by pressing CTRL + 0, which toggles the visibility of the menu bar, command window, and status bar.

About the author

Wei Zhang

Wei Zhang

Wei Zhang is a renowned figure in the CAD (Computer-Aided Design) industry in Canada, with over 30 years of experience spanning his native China and Canada. As the founder of a CAD training center, Wei has been instrumental in shaping the skills of hundreds of technicians and engineers in technical drawing and CAD software applications. He is a certified developer with Autodesk, demonstrating his deep expertise and commitment to staying at the forefront of CAD technology. Wei’s passion for education and technology has not only made him a respected educator but also a key player in advancing CAD methodologies in various engineering sectors. His contributions have significantly impacted the way CAD is taught and applied in the professional world, bridging the gap between traditional drafting techniques and modern digital solutions.