Fusion 360

How to Change Inches to MM in Fusion 360?

Changing the default unit of measurement in Fusion 360 from inches to millimeters is a straightforward process that can significantly enhance your design workflow, especially if you are accustomed to using the metric system. Here’s a detailed guide on how to accomplish this.

Accessing Document Settings

  1. Launch Fusion 360: Open the software and ensure you are in the workspace where you want to change the units.

  2. Navigate to the Tools Tab: Look for the main toolbar located at the top of the interface. Click on the “Tools” tab to access various tool options available within Fusion 360.

Modifying Units

  1. Select Document Settings: Within the Tools tab, locate the “Options” panel. Here you will find the “Document Settings” section. Click on this to open the relevant settings dialog.

  2. Open the Units Tab: In the Document Settings dialog box, you’ll see several tabs. Click on the “Units” tab to view the current unit settings for your active document.

  3. Change the Length Units: In the Units tab, find the “Length” drop-down menu. Click on this to reveal a list of unit options. Scroll through the options and select “Millimeters” to set the unit from inches to millimeters.

  4. Apply the Changes: After selecting millimeters, make sure to confirm the changes by clicking the “OK” button. This will apply the new settings to your current document.

Setting Millimeters as Default (Optional)

  1. Make it Default (if needed): If you wish to set millimeters as the default unit for future projects, look for an option to set the current settings as default (usually a checkbox in the same dialog). Mark this option if it is available and if you want to use millimeters for all future files.

Understanding Impact on Existing Designs

  1. Review Existing Measurements: Keep in mind that once you change the unit of measurement, all existing dimensions in your design will be converted to the new units. Make sure to review and adjust any dimensions as necessary to ensure they align with your design requirements.

  2. Display Units Clearly: To ensure that your measurements are easy to discern, you may want to check your drawing’s annotation settings. This may include toggling the display of annotation units to make them visible in the workspace.

FAQ Section

Q1: Can I change the units for individual components within a single file?
A1: Yes, you can adjust the units for individual components within a file by following the same steps outlined above, which will only affect the active document where the changes are made.

Q2: Will changing units affect imported models?
A2: When you import models, Fusion 360 asks for a unit type. Ensure you select the correct units during import to make sure everything aligns correctly after changing units in your working document.

Q3: Is it possible to revert to inches after changing to millimeters?
A3: Absolutely. You can repeat the same process to change the units back to inches or any other option available in the drop-down menu under the Units tab in Document Settings.

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.