How to measure the real lenght of a curve on solidworks?

Thank You David Thomas! I thought it would be better to add a tutorial. And i can do it now. Thanks again!

  1. Step 1:

    If you have a sketch like that and you want to measure it, so start with the next step.

  2. Step 2:

    Click on the arrow on the top, then Tools, then Measure... (You should be editing your sketch)

  3. Step 3:

    You will see a ruler that you can move with your mouse. Click on the curve when measure tool is selected.

  4. Step 4:

    You will see the Arc Lenght and Chord Lenght in a box.

  5. Step 5:

    You can use that tool for both 2d and 3d sketches.