> ## Documentation Index
> Fetch the complete documentation index at: https://docs.3dpreppro.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Measure

> Measure distances between any two points on your model

<Frame>
  <img src="https://mintcdn.com/alphaworks/4GKl9wpYAwI5IRWf/images/editor/tools/measure.png?fit=max&auto=format&n=4GKl9wpYAwI5IRWf&q=85&s=a644b3a69239953feeee46c42b6acc80" alt="Measure tool showing two points and distance readout" width="3420" height="1836" data-path="images/editor/tools/measure.png" />
</Frame>

Measure calculates the distance between two points on your model — both the straight-line distance and optionally the distance along the surface.

## When to use this

* Checking if a feature is the right size
* Verifying dimensions match your design specifications
* Measuring the distance between mounting holes, edges, or features
* Checking the path length along a curved surface

## Settings

### Point A and Point B

Click on the model to place each point, or enter X, Y, Z coordinates manually.

### Geodesic distance

Toggle (default: on). Also calculates the distance along the model's surface — not just a straight line through the air.

## Results

After placing both points, click **Apply** to compute the distances (the button shows **Processing...** while it runs). Once the calculation finishes, you see:

* **Straight-line distance** — The shortest path through the air
* **Surface distance** — The shortest path along the model's surface (if enabled)

## Step by step

<Steps>
  <Step title="Select the Measure tool">
    Click **Measure** in the Interactive Tools section.
  </Step>

  <Step title="Click Point A">
    Click on the model to place the first measurement point. A marker appears.
  </Step>

  <Step title="Click Point B">
    Click again to place the second point. A second marker appears.
  </Step>

  <Step title="Click Apply">
    Click the **Apply** button to compute the distances. The button shows **Processing...** while it runs, then the results appear.
  </Step>
</Steps>

## Tips

* **Surface distance** is useful for measuring around curved features (e.g., the circumference of a cylinder)
* You can manually type coordinates for precise placement
* For overall dimensions (width, height, depth), use the [Object Info](/editor/tools/object-info) tool instead