How to turn any square into an octagon 

You always make things so simple. Keep em coming!

Thanks for this! That "multiply by .42" was a great tip and helped me a lot!

Awesome tip, thanks for sharing. I just cut a perfect octagon using your formula, it took me less than 10 minutes.

Not all heroes were capes, and not all wizards were pointy hats. So grateful for you!! Life saver

wow... I'm so glad my search to find a way to turn a square into an octagon led me here... you have simplified this so that anyone can use your formula... thank you so much...

My favorite parts of your videos is the Math portion. My students hate Math and these videos show them how they they really apply math to everyday life. Thank you! I subscribed.

Another good carpentry class, keep'em going!

Thanks. My square was 29 7/8". The decimal too fractions was tough. But your method work well and our new coffee table is an Octagon made from scrap lumber. Thanks again

Just found your channel. Really enjoying your videos. Very helpful. Thanks.

Can’t thank you enough! I’ve been losing my mind and patience but then along came your channel! 🙏🙌🤝

4 years since this was posted and it is still being useful. Just the trick I needed to know today.

TY very much for your help! Your instructions were very clear!

For me as well this was a huge Assistance the way you described so transparent. Thnaks so much :))

Very cool. Don't know when I'd use it, but now I know how to do it.

Man you really worked up a sweat drawing those lines. LOL

Thank you for sharing this valuable information. I was wondering how to do this. Much easier than I thought. Now I can figure out what size I need to make to add to my fencing idea

You can also just draw a isosceles right triangle with one of the square's side being the hypotenuse, and measure either of the short sides, and that is the distance from one corner to the square to a corner of the octagon near an adjacent corner of the square.

Thanks for the equation.

Thank you! Great explanation!

you saved my project

Again.....great info...Thanks for sharing !

42 is wrong more precisely it is 41,42 41.42% is a percentage, that is, 41.42% of the side of the square is equal to the side of the octagon, knowing this percentage you can easily find out the length of the side of the octagon (12*0.4142=4.92704) I also know how this conclusion was reached, but it is too much to explain Sorry if I made grammatical mistakes I used Google Translate

Technically, more accurately you multiply the squares side length by the root of two, then divide that number by square root of two plus two. So: a = square side. b = octagon side. b = (a*√2)/(√2+2) Took me a while to figure it but I made it lmao.

Great content as usual!

Perfect, thanks!

what is the calculation for a hexagon?

From a mathematical perspective, why multiple by .42?

If I have 15.25 (w) work with and I multiply by 0.42 = 6.405. I get it that it's 6" and what is the .405 equals to what fraction? I have a total length of 8 feet. So I am trying to figure out just 1 then afterwards deciding how many more I want to add to my total of my 8 feet.

Is it always in inches you multiply