The #1 Beginner Trim Mistake & How to Avoid It / How to Measure & Cut Mitered Corners
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- เผยแพร่เมื่อ 26 พ.ค. 2023
- This is how you measure and cut inside and outside miter angles for trim, baseboard, crown molding, or anything else that needs an angle bisected and then calculated for a miter saw or a miter gauge on a table saw. Measure the angle with an angle finder or protractor. Subtract that number from 180. Then divide the number that you get by two. The number you are left with is what you set your saw to. There are tools that can do the math for you, but it's good to at least know how to do it.
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I'm not a carpenter, but I've been woodworking for 15+ years. Honestly, I thought I was pretty smart. But as obviously simple as this is, I never, ever knew this, nor considered it! Thanks for teaching me ANOTHER thing. Your channel is a gift, from start to finish--thank you!
I’m a mathematician, and this didn’t seem obvious or simple at all to me.
One thing I learned from competitive gaming is there are always a collective of skilled people who come up with one good tip/trickand it spreads to everyone. It would be impossible for one person to figure out everything for them selves even if they do it for a long time. Always be looking to learn from others even if you have lots of experience.
I've said it before but i really appreciate these videos. Not long and to the point. I love longer build videos and such but these shorter ones are quick and i immediately gain new knowledge. Thanks!
Good explanation. Simple and to the point with no fluff.
Just stumbled across your channel a couple of days ago and gotta say it's easily the most useful and concise I've seen. No filler, no junk, no long-winded personal anecdotes no one cares about. I'm appreciative that I know I'm gonna learn something useful every time. Thanks for your time and efforts.
You described my home exactly. Not one single corner is 90. So these tips are a fabulous addition to my bag of tricks.
Virtually every home was described. 😀
After years of using filler on my mitre joints I finally understand where my mistake was made. Thanks Dude and thanks you tube.
LMBO! "You need a new home?" That's hilarious!!! 😂😅😊
Awesome tip! This really takes the “trial and error” out of process to get that perfect fit, the first time! LOVE YOUR CHANNEL, so much KNOWLEDGE!!!!
I just bought a finding finder, and I had no idea how it worked and this gentleman has clarified it to me 👏
Keep these educational videos coming. I love how simple your explanations are!
Never gets old telling you how awesome your channel is; thanks for another GREAT lesson!
this guy is a life safer. I have a job to install some baseboards tomorrow morning in my friend house. I did measure some angles at the job side and I was getting 88 to 92 degrees and I was going to simply divide that number by 2 to make my cut...that would have been a real head scratcher for me...but not any more......thanks a lot
First video I have watched on your channel. Just bought a miter saw. Had I not seen this I probably would have gotten frustrated and stopped right there. I can not thank you enough.
Man, another super helpful tip, and just in time. I'm about to do the base board throughout my entire house. Thank you.
The information you provided on woodworking has helped me immensely. I’m so glad I found your channel
Your last statement was pure gold.😂
For peeps who don't know why this trick works, it's because on a miter saw, when the blade is perpendicular to the fence, the scale reads 0° when it's actually 90°. I never understood why manufacturers did this.
Zero means no angle on the cross cut , plain and simple
@@stevenfoust3782 I get what you're saying but for newbies that could be misleading way to say it.
@@BigBrotherIsTooBig 30 yrs as a finish carpenter says it works as advertised. Newbies have to learn by making piles of sawdust
@@stevenfoust3782 Ofc it works. It'd work if it said 272 instead of zero as long as you compensated for it. Doesn't mean it's the best way 😀
@@BigBrotherIsTooBig I understand the the saw scale is not actually proper when you figure everything from 180*, but it is accurate when cutting angles in relation to installing whatever is being fitted. Using 180 as a starting point when trying to figure out odd angles is used instead of guessing. Sure 0 is actually 90 but 45 is still 45 so…
Yet another video to save and refer to. Thank you for making things easy to understand.
Love your little tip videos 👍
Another great tip! Keep these up - you're providing some great insight without a lot of math.
Jodi - Great tip! Thanks so much! Simple and to the point!
Thankyou so much for this ! I have run into this recently and my mind is just blown! Thankyou!
absolutely LOVE these quick instructional Vids, so much great info, keep em coming please
You, always have good ideas.
An excellent explanation about how to avoid a very common goof.
This is how I teach my apprentices. I'll just send them this video now 😂 thanks for your content man.
Thanks for another great video to uncomplicate figuring angles 👍🏻👊🏻
Personally, I use the Starrett Plastic Miter Protractor. No math needed! Does both inside and outside angles. Still, this is a good information to know!
Really good tip and great explanation!
Oh... Very interesting indeed!!! 😃
Thanks a bunch, dude!!!
Stay safe there with your family! 🖖😊
Great info. I'm saving these miter videos so next time I'm in the shop scratching my head over some #!@ angle I can figure it out easy-peasy.
Very useful tips. Thank you. 🇨🇦💝🙏👍
good tip! struggled for years before learning this
The Master does it again.
Another great tip - thanks!
Awesome...thank you!
Love that last ‘New Home’ comment 😂
Wow! Thank you
Much appreciated!
Your'e a life saver....
thanks......keep 'em coming
Good information. Thanks. I was working on soffitts and could not get a corner angle right.
That’s AWESOME.
This is Great ,Thank You 👍👍👍👍👍
BRILLANT!
Hi, my method is to read the gauge, divide by 2, move the gauge to reach the calculated half, lock the gauge and bring it to the miter saw to copy the angle and cut. Almost no math involved and a perfect fit. Greetings from France.
@Pierra A little slower, but that’s a great idea!
@@InspireWoodcraft thanks for your answer. The main advantage for me is to compensate any inaccuracies of the miter saw graduation, this allows me to skip a reading/setting step. Thanks for all the knowledge and tips that you share on your channel for a while, it’s always a pleasure to follow you !
The math is correct but a more intuitive way, in my opinion, to calculate the cut angle is to start by dividing by two and then subtract that value from 90.
Why? Well, the angle you want your cut at is half of your measurement, so start by dividing that by two. But your mitre saws scale is reversed so before cutting you need to flip it and you do that by subtracting from 90.
This follows the thought process better. You want half the angle and then you adapt to the reverse scale on the mitre saw.
A usefull point is also that your intermediate result is your target angle and something you can verrify by mesauring the cut pieces. Also if your saws scale happens to go the other way (I have never seen a saw lika that but just image for a sec) this is the value to cut at. The (180 - meassurement)/2 method will indeed give you the same result but isn't as easy to grasp why it works.
Thanks. Genius, again.
60? Think you must know the builder of our last house.....
😂😂😂
More great tips!!!
i like ......big up to doin this video....
I'm an engineer so I understand how this works but most people in their workshop aren't going to get into complicated math. Here is how I would look at it- exaggerate the situation and then consider what the angle would be. For instance if you measured 88 degrees then that is a bit "closed" from a true 90 degree corner. Now close those arms some more and think about what the angle would be. It is easy to see that the angle is much larger than 45 degrees therefore it makes sense that instead of setting the saw to 44 you would set it to something like 46. Well you have to do a little bit of math- a corner is 90 degrees so 2 angles that fit in the corner have to add up to 90 degrees. Half of 88 is 44, you need to set the saw to 46 which is the complement of 44 degrees. They add up to 90. If you took my example and closed the angle even further, maybe you get 70 degrees. Half of that is 35 but you can see that 35 is incorrect so set the saw to the complement of that which is 55 degrees.
Yes, you made it worse to understand by re-explaining it.
Thanks though, it’s the thought that counts. I still liked the explanation.
I believe you… but I don’t. Seeing the miter saw set up would have helped me understand this one… but I know you’re right because your tips are always super helpful and inspiring
If we wanted to do this for trim around the window how would we do that? Same as the quarter round ?
Perhaps it would make more sense if saws were not marked as 0 degrees in the centre, but as 90. In a standard cut, that's what you want, a perfect 90 degree square. Then the more versatile saws would go all the way down to 40 in either direction, which would make it a snap to make a 80 degree mitre.
Some videos show putting a piece of tape behind the scale on the miter saw and writing the correct angles on the tape, which you can then use with your original measurements and no math. Start with 90 at the center (0 on the saw’s scale) and subtract the saw’s scale number from 90 for each graduation.
Does this work of exterior corners too?
Great video. Very helpful, thank you! How do you make this work if you don't have a digital angle finder?
@danielmackey6594 I don't know if this will help, but it's an option (th-cam.com/video/ACGbbjrFSqY/w-d-xo.html) Also, there are tools available for this kind of work that do the match for you. The Starrett miter protractor is pretty popular (amzn.to/3Uxe9Y0). The SawSet Pro is another really good option too (amzn.to/4d9NTKx), but you have to have/use a sliding t-bevel to use it.
@@InspireWoodcraftThat video shows a pretty good method. Today I was installing quarter round trim. Using the overlap method would have be very difficult. Thankfully I was able to pick up a digital angle finder.
@@danielmackey6594 Oh good! The overlap method works really well for establishing the angles, and on quarter round, or other awkward profiles, I would use flat stock to establish the angle that needs to be cut, set the saw to that angle, and then cut the quarter round to that angle. But, you found an angle finder so it sounds like you’re all set!
I've often wondered why tool companies didn't or couldn't build a full 180 degree miter saw. The radial arm saw is the only one that I am familiar with though and even those were "super-sketchy" when cutting acute angles.
@Brett Jenkins Ive wondered the same thing. I’ve heard that they were originally made for framers, who have a different work flow. Even if that was the case, why are miter gauges and table saw blade tilt gauges inverse as well?
which glue do you use?
Corners in homes are that much out of square as a matter of course. It’s challenging to work with, but those houses will still be standing when all the newer homes with square corners have collapsed as the glue and joist hangers deteriorate.
I may sound like an idiot! But where does the 180 come from? I get 90° I get two 45° and so on. But in layman as you can, how'd we get the 180 to reduce from? Thanks in advance! I've really enjoyed the miter video series you been doing lately.
"Cogito Ergo Sum" That's what I like about you.
The confusing thing is that the angle on the mitre saw is "degrees from a square cut", not "degrees from a parallel cut. Which makes sense, until it doesn't :-)
Did you record this at 4:11am?
@jercubsfan Haha! PM
This goes against every other video cutting corners
But what if you live in a lighthouse?
For the algorithm
I wish you had made this video 5 months ago🤣
Iknowrite!! How many times have we struggled?? How long have we fought the battle of angles? His content sure helps get us ready for success.
Ok I am a “ professional “. I do this for a living however where I find a lot of problem with this very “ true” theory is inside 22.5 crown that is off? Say 22.8 or even 23.1 that’s the issue & yes you can go from the 180 to an obtuse angle ? And get deep into the weeds while you hv 250’ more to go?
Can you give me a fairly quick solve rate here? It’s always the 22.5 crown where the sleeping bear is?
This technique will work for crown if you cut it "in place" and even if you cut it flat.
But if you cut it flat the compound cut is really hard to get accurate enough to look good.
Not sure of your technique for cutting crown but you don't need to be 100% accurate. If you're close, within a few tenths of a degree I would recommend gluing and nailing the corners and if there is any gap at the wall or ceiling, it can easily be filled with caulk.
@zephyr1408 I’m not sure I totally understand the question, but if you’re cutting it nested, there shouldn’t be a problem math-wise.
@@InspireWoodcraft there is actually. And next time I hang crown I will shoot you the problem. Not saying it’s this system ? But def having issues finding correct miters with low numbers.
@@zephyr1408 I'd love to see that. Shoot your method of measuring and cutting so we can see what's going on. 👍
@@InspireWoodcraft I went back to your other video you hv and some of Spencer Lewis . Crown is always a challenge especially doing short back to back inside corners. The rest is not an issue and I hang it alone. Thee one I find most challenging is 2 piece kitchen !
Anyway my apologies if I was unclear!
You need a new home 😂😂😂
Wait, people been doing this wrong? This is just basic maths. Y'all fail high school or something?
@Matt It’s only basic math if you already know how it works. The first time anyone cuts on a miter saw without being taught how it works, cuts wrong at anything but 90 and 45.
to complicated for anyone looking for advice I dont have that tool and would never think to buy one. Nothing against the gentleman who is prsenting.
Frankly, if a person can't figure this out by himself he should stay far away from the saw.