# What angle do I cut the trim here?

+15

I have sloped ceiling and I can’t figure out how to cut the trim to go on the top of this bookshelf. I’m not doing crown molding, just a half round type trim. I’ve attached a pic of the angle finder numbers and the sloped ceiling. Thanks!

• Mogie on Dec 03, 2021
• Oh math and angles, brain bender for sure, ouch! Looks like your horizontal piece would be 153.5-ish degrees, and your sloped piece at the joint would be about 36.5. Definitely use some scrap pieces to test first!

• See 2 previous
• It is like a bevel cut, yes. Mark your angle on the trim with a pencil and then use a fine toothed hand saw, or miter saw, to cut it. You might find it easier to lay it flat to cut but your test pieces should help you figure everything out. I’m cheering you on!

• Seth on Dec 03, 2021

You can find youtubes about how to figure angles without a protractor. I like to make a cardboard template that I can adjust in increments until it fits the angle of the sloped ceiling. I then adjust my mitre saw to match the angle and test fit a scrap.

• See 2 previous
• Seth on Dec 04, 2021

A bevel gauge is another inexpensive useful tool for copying angles and transferring them to your work piece.

• Michelle Leslie on Dec 04, 2021

Hi Faddu, this video has such a simple but awesome trick you can use to figure out that angel. No maths just two pieces of wood - https://www.youtube.com/watch?v=EyVL2ByubVw

• Betsy on Dec 04, 2021

Hi Faddu: Don't over think this thing, which is so easy to do :) What I do when confronted with these types of problems is to take a piece of typing paper, put it on the ceiling edge with painters tape, putting the corner of the paper along the edge where it meets the wall. It should stick there. It will be straight, going down the wall. Then, I put another piece on the wall edge, corner meeting the other corner at the ceiling, and secure it with painters tape, overlapping the 2 pieces. This piece will overlap the ceiling piece quite a bit. Then, I tape the 2 together along the vertical line. You should have a perfect angle then. Remove and make a pattern on something a bit more sturdy or just measure the angle and you should be good to go.

Good luck

• Annie on Dec 05, 2021

OK, First the scale to use is the one that is showing about 27 deg. Divide that in half = 13.5. Set your miter saw at 13.5. Cut two scrap pieces and try the fit. Adjust as required.

• Deb K on Dec 05, 2021

Hi Faddu, hope this helps you out,