AutoCAD

How to Set CM in AutoCAD

Understanding the Basics of Metric Units in AutoCAD

Why Choose Centimeters?

When working on design projects in AutoCAD, setting the appropriate units is crucial for accuracy. For many professionals, particularly in countries that employ the metric system, centimeters (cm) are a preferred measurement. Using centimeters allows for precise scaling and helps avoid errors during the design and implementation phases.

Setting AutoCAD to Centimeters

Step 1: Open the Drawing

Begin by launching AutoCAD 2025 and opening the drawing file where you wish to set the units to centimeters. If you are starting a new project, create a new drawing file through the appropriate menu options.

Step 2: Access the Drawing Units Settings

To access the unit settings, navigate to the top menu and find the “Application Menu.” Click on it, and select “Drawing Utilities.” From the options displayed, choose “Units” to open the Drawing Units dialog box.

Step 3: Configure the Unit Type

Within the Drawing Units dialog box, you will see options to modify various settings. Look for the “Insertion Scale” section. Here, you can choose the type of units you want to use. Set the “Unit type” to “Decimal” to accommodate centimeters appropriately.

Step 4: Define the Length Type

In the same dialog box, look for “Length” options. Change the value to “Centimeters.” This ensures any measurements taken or displayed in your drawing will be in centimeters. Confirm that the “Precision” is set according to your project requirements – typically two decimal places provide sufficient accuracy for most designs.

Step 5: Apply Changes

After adjusting the settings, click the “OK” button to save and apply the changes to your current drawing. Following this action, any lines, dimensions, or other elements you draw will now be measured in centimeters.

Using the Command Line for Quick Units Change

Step 6: Utilize Command Line Access

For those who prefer using the command line, you can quickly set units by typing “UNITS” into the command line and pressing Enter. This will immediately prompt the Drawing Units dialog to open, allowing you to follow similar steps as outlined above to set measurement units to centimeters.

Step 7: Further Adjustments

If your design requires other settings, such as adjusting the angle measurement or changing the precision level, this can also be done through the same dialog box. Consider revisiting the options if adjustments are needed for improving clarity in your drawing.

Verifying Unit Settings

Step 8: Check Your Drawing

Once you have set your units, it’s a good practice to verify the change. Use the measurement tools available in AutoCAD to check dimensions in your design. This ensures that you haven’t made any miscalculations and that all elements adhere to the centimeters setting.

FAQs

1. How can I switch between metric and imperial units in AutoCAD?

To switch between metric and imperial units, go to the Drawing Units dialog (type “UNITS” in the command line). Change the unit type and precise settings according to your new preferences, then click OK to apply.

2. What should I do if my dimension styles do not reflect the units set in AutoCAD?

If dimension styles do not match the units, navigate to the Dimension Style Manager and modify the styles according to your new unit settings. Ensure the “Primary Units” match the selected unit types.

3. Can I set centimeters as the default unit for all new drawings?

Yes, you can set centimeters as the default by modifying the template file (DWT) used for new drawings. Open your preferred template, set the units as described, and save it as your default template. This way, all new projects start with the desired unit setting.

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.