Can You Dimension an Arc Length in SolidWorks?

Can You Dimension an Arc Length in SolidWorks?

In SolidWorks, you can easily dimension various features such as lines, circles, and polygons. However, for those who are new to the software, the question often arises: Can you dimension an arc length in SolidWorks?

The answer is yes! In this tutorial, we will explore how to dimension an arc length using SolidWorks.

Creating an Arc

Before we can dimension an arc length, we first need to create an arc. To do this, follow these steps:

  1. Open SolidWorks and create a new sketch on the desired plane.
  2. Select the “Arc” tool from the sketch toolbar.
  3. Specify the center point of the arc by clicking on a point on the sketch plane.
  4. Next, specify the start and end points of the arc by clicking on two points on the sketch plane.
  5. You can also adjust the curvature of the arc by dragging the handle that appears at its midpoint.
  6. Click “OK” to finish creating the arc.

Dimensioning an Arc Length

Once you have created an arc in your sketch, you can now proceed to dimension its length. Here’s how:

  1. Select the “Smart Dimension” tool from the sketch toolbar or from the “Annotations” dropdown menu.
  2. Hover your cursor over one of the arcs you want to dimension. You should see a preview of where your dimension will be placed.
  3. Click on one side of the arc where you want to place your dimension line.
  4. A dialog box will appear, allowing you to enter the desired dimension. Type in the desired length for your arc and press “Enter”.
  5. The dimension will now be displayed on your sketch, indicating the length of the arc.

Note: It is important to ensure that your arc is fully defined before attempting to dimension its length. This means that all necessary constraints and dimensions should be applied to your sketch, ensuring that the arc’s position and curvature are accurately represented.

Modifying an Arc Length Dimension

If you need to modify the dimension of an arc length, simply follow these steps:

  1. Select the dimension you wish to modify by clicking on it.
  2. The dimension value will become editable. Enter the new value for the arc length and press “Enter”.
  3. The dimension will update accordingly, reflecting the new length of the arc.


In conclusion, SolidWorks allows you to easily dimension an arc length within your sketches. By following a few simple steps, you can accurately represent and modify the length of arcs in your designs.

This feature is incredibly useful when working with curved geometry or when specific arc lengths are required for design specifications. So go ahead and try it out in your next SolidWorks project!