Creating a Curved Cutout in Sketchup | Sketchup Q&A

Featured image_ Creating a Curved Cutout in Sketchup

In this Sketchup Q&A session, we’re going to tackle how to make a curved cutout in Sketchup. Aunt_marge on Reddit asks:

“Can I achieve the curved face on this table leg with Make2017?”


The answer is yes! Keep reading and we’ll show you how in just a few simple steps!

Draw rectangle. To mimic the original geometry, let’s start by drawing a rectangle. Use the “push/pull” tool to extrude it up.

Draw an arc. Use the arc tool to draw an arc on one of the faces. Close off the arc with a line to create a shape and a draw a straight line along the blue axis. We close off the arc because Sketchup doesn’t allow us to flip lines by themselves.

connect arc for cutout in Sketchup

Press “m” and then “ctrl” to move a copy of the arc along the blue axis. Right-click on the shape you just copied and moved and select “flip along” > “blue direction.” Make any final adjustments for where you’d like your cutout. Now we can delete the extra lines we used for closing off the arcs.

create curve for cutout in Sketchup

Reverse face. If your new geometry doesn’t look the same as the rest of the model, you’ll want to reverse its face. Right-click on the shape and select “reverse face.” If the shape does not have a face after you delete the extra lines, simply draw a line connecting the top arc to the bottom arc.

Copy. Copy and paste the shape to the adjacent face of the rectangle. Right-click on the shape and select “flip along” > “red axis.” Move the shape so that it lines up with the first one.

meet curves for cutout in Sketchup

Create the Cutout in Sketchup

Now that we have the basic shape, we can create the actual cutout. There are a few different ways you can achieve this.

Connect the Endpoints

Delete. The first method is to delete the faces of the shape you just created. Then, find the endpoints between the edges of the cutout shape and connect each one.

connect endpoints of cutout in Sketchup

Erase. Use the eraser tool to hide the lines on the curve. Hold “ctrl” while using the eraser tool and drag it over the lines you want to hide. This will smooth out the geometry and give you a soft curve.

hide lines of cutout in Sketchup

Cut into the Shape

The second way to create a curved cutout in Sketchup is to use the shape you created to cut into the rectangle. Copy one face of the shape you drew and place it next to the rectangle.

Draw a Circle. Hit “C” to open the circle tool. Click the top of the shape and drag the mouse to draw a circle on the green axis. Delete the face of the circle.

draw circle above cutout in Sketchup

Follow Me. Select the circle outline, click on the “follow me tool” and then select your shape. Double click on the shape and select “make group.”

use "Follow Me" tool for cutout in Sketchup

Select the endpoint at the top of the shape and drag it to connect with the top endpoint of the arc in the rectangle. Double click on the rectangle and select “make group.”

align endpoints for cutout in Sketchup

Subtract. Right-click somewhere in the top menu bar and make sure “solid tools” is selected. Click on the “subtract” tool from the “solid tools.” Select your cylinder shape and then select the rectangle. If the subtract tool isn’t working, it could be that there is a line intersecting with the shape somewhere or the geometry isn’t closed.

subtract cutout in Sketchup

Erase. Hold “ctrl” while using the eraser tool to hide the extra lines.

final cutout in Sketchup

The first method can be a bit tedious, but for a small shape, it will give you the smooth curve you are looking for. If you have to create the same curve on all four corners, using the subtract method may be the better option for creating a cutout in Sketchup. Be sure to check out the rest of our tutorials for more great tips!

Happy Hacking!


  1. allstarcarpetandtiles June 24, 2019 at 10:31 am #

    Great tips. I’m bookmarking this page. Its a great resource to keep. Thanks for sharing.

  2. hamzakhan17826 May 19, 2019 at 7:16 am #

    Ok sure, I will follow your steps before going to do exams. I hope your article will help me more.

  3. karlmistos May 14, 2019 at 10:41 pm #

    Thanks for sharing this. I’ll definitely share this with my classmates at de la salle zobel.

  4. classboat01 October 17, 2018 at 7:37 am #

    Hello there and thanks for your information, I have certainly picked up allot new info from right your post. You are also provided information about best tips for exam,Which is very helpful to me and other people also.

  5. mikemoreno September 5, 2018 at 3:48 am #

    thank you very much, verry helpfull…

  6. jogesh12345 August 14, 2018 at 1:55 am #

    Very effective and informative article.Thanks for sharing such an important tutorial.

  7. FLMIMA August 11, 2018 at 9:20 pm #

    Really helpful website

  8. Rumi July 15, 2018 at 7:16 am #

    I feel very grateful that I read this. It is very helpful and very informative and I really learned a lot from it.

  9. RJennings April 28, 2018 at 6:12 pm #

    Thank you for this website. The practice questions are helpful.

  10. Scott March 22, 2018 at 1:50 pm #

    Taking this test on Saturday. Last 4.0 exam to complete for the trio, then on to 5.0. This site is my go-to place when organizing what materials I’ll be studying

  11. shozab January 30, 2018 at 2:22 pm #

    Hi , very good article.

    thanks for sharing, keep up the good work

  12. dyba January 27, 2018 at 1:08 am #

    Good advice. Best of luck to all!

  13. KendraShirley January 16, 2018 at 4:04 pm #

    This is my favorite site for practicing for my tests! Great advise and super helpful.

  14. reximagetrim January 16, 2018 at 10:37 am #

    Nice post to read. A complete guide that can help all of us.

  15. tylerstockholm December 17, 2017 at 9:37 pm #

    Nice one… very helpful! Thanks!!!

  16. Aartiwalvekar November 21, 2017 at 8:56 am #

    Nice post

  17. Aartiwalvekar October 9, 2017 at 9:45 pm #

    Great post!

  18. Tony August 30, 2017 at 7:07 am #

    In the NCARB ARE 5.0 handbook they reference Fundamentals of Building Construction: Materials and Methods in both of their example questions for cost estimating. Unfortunately there isn’t a specific chapter on cost estimating, it’s woven throughout the content.

  19. Spencer August 30, 2017 at 1:15 am #

    What is the best reference for cost estimating for PDD.

  20. Amy July 26, 2017 at 3:24 pm #

    Thanks! Great advice

  21. Tony June 29, 2017 at 7:23 am #

    Deciduous trees should only be used for shade (especially in temperate climates). Deciduous trees lose their leaves in the fall and will have little protection against wind in the winter when it is most needed. Likewise, the leafless trees allow solar heat gain in the winter when it is desired, and shade in the summer.

    Coniferous trees are only to be used to block wind and views. Since they don’t lose their needles, they work great for these two items year-round.

  22. Shahid Logan June 28, 2017 at 4:50 pm #

    Hello. My name is Shahid. This comment is for anyone who would like to reply. On the Siteplanning test. To block the wind, can you use a Deciduous tree or must you use a Coniferous tree?

  23. Mike January 4, 2017 at 11:04 am #

    Hi Tony,

    I need to take 5.0 PPD & PDD. Do you plan on posting notes such as “Caroline’s Notes” that you had posted for the various 4.0 exams for either of those sections? I found those notes to be some of the best resources in studying for the 4.0 sections. If so any idea when? Thanks

  24. Stephen October 17, 2016 at 9:30 pm #

    Hi Tony,
    Any updates on the SS exam ? If there’s an expected release date ? Thanks

  25. DesignerHacks October 4, 2016 at 12:11 pm #


    We are releasing practice exams for the SS exam later this fall.


  26. Paige October 4, 2016 at 11:34 am #

    Will you have SS questions on here at some point?

  27. Daniel September 9, 2016 at 8:47 am #

    Great post, very helpful with the lists of suggested materials, I just passed CDs in July and am taking PPP in November so I definitely needed the list.

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