Lagniappe Peddler
  • LAGNIAPPE PEDDLER BLOG
  • ABOUT OUR DESIGNS
  • DESIGNS BY CATEGORY
  • SALE SALE SALE
  • FREE EMBROIDERY DESIGNS
  • CONTACT LAGNIAPPE PEDDLER
  • ABOUT LAGNIAPPE PEDDLER
  • VIDEO TUTORIALS AND SEW FOR A CAUSE

Sewing Math For Circles

5/18/2020

 
Picture
Sewing Math.  If that gives you a headache, I totally understand.  My math skills have always been something that is continually evolving and also a disappointment when I just don't "get it".  I can't blame my teachers because they taught math in the setting that was available to them and it was the only one I had access to. Now with the internet and so many generous people out there, we have a lot of different learning methods.  I am convinced if someone would have found out my sewing interests way back then and applied Math Skills directly to that, my skills might have improved. I "see" measurements and projects in Pictures more than numbers. Another thing that I have come to understand is memorizing formulas is only as good as being able to physically practice them. This tactile learning process is so much more helpful to me than say a WORD PROBLEM. YUCK. Also, a little advice to you out there who beat yourselves up when you can't remember those formulas?  Don't.  You can never remember everything, but if you have a general understanding and can look it up, you will be A-OK. So how do you figure out the circles you will need when you want to make a bolster or neck pillow?
Picture
Here is a remnant piece of fabric I used to test out a Waving Flag Embroidery Design. Which you can see here in my store. When I stitch out my designs, I always have a lot of these around my studio and I like to make small quick projects with them. I am not working from a pre-determined pattern. Instead, I am using the piece of fabric in the size I have available. So, to make a bolster or neck pillow, I need to figure out how big the circle needs to be for that specific size fabric.  First you need to do some measuring.
Picture
I know that when I sew this pillow I am going to fold the right sides together and sew that long edge to make a tube.
Picture
This opening on the ends of that tube is where the circles will be inserted into. So I will need that measurement. It is too hard to try and get it measured right when it is in a circle. 
Picture
If I open it back up and lay it flat, I will measure that edge.  This is called the Circumference. Now stick with me if that makes the brain fog start to come over you like it does to me. For some reason, the word Circumference is confusing to me. It sounds so much like the word circle.  If you remember that circumference can be a "Linear" or a flat LINE measurement it might make more sense.  When I lay out my fabric edge flat , I have a "Line" or "linear" measurement that will be my circumference.
Picture
If you look at the formula above, you will put that measurement where it says Circumference.  My edge was 13.25 inches.  Then you will divide that number by pi (3.14)  Once you have done that, you will have the Diameter of that circular opening.  Mine was 4.219.  That is all you need to know. If I keep my fabric edge length this size I need to cut a circle that will measure 4.219 inches across.  Using this formula, you can work with any size fabric you have in your stash to make a quick bolster pillow.  I didn't want to try and cut out a circle that had all of those numbers after the decimal point, so I figured out my formula again until I had a number close to 4.
Picture
I cut my fabric edges to 12.5 inches and my formula showed 3.98 inches. I rounded it up to 4 so now I know I should be able to cut a circle that is four inches wide (Or has a 4 inch DIAMETER) and if I use the same seam allowance on that long edge and when I sew the circles in, everything should fit.  How will I cut out a perfect four inch circle though?
Picture
You have many different choices. You can use a compass, ruler with many holes or a pencil and piece of string.
Picture
Another great option is to make your own circle template. This is my choice because it makes more sense to me and the way I "see" measurements. Also, the circle sizes are already figured out for me. Once I know my size circle, I just pick the right number and the template does the heavy math lifting.  If you will be sewing bolster pillows on a regular basis and you want to be able to quickly cut out circles, this template will make your measuring and cutting easier.
Picture
I really like to use the cutting mats from Dollar Tree for my templates.  They are easy to lay on top of things I have drawn out on paper and trace.
Picture
So here is how I drew this circle template out. I used my cutting mat and since I will be drawing circles by placing something on one end and tracing around, I know that I need to use half of my circle measurements. See the one inch mark on my mat?  If I place my pencil there and move the template around, I will actually trace a two inch circle.  If I use the two inch measurement it will make a four inch circle and so on.
Picture
Picture
Here is my circle. I used the mark at the 4 and now I have a four inch circle.
Picture
I sewed the long seam on my pillow right sides together. Leave a small opening in the middle of that long seam so you can turn the pillow later. Then I pinned the circles with right sides facing in to the tube ends. If you finger press the circles and the pillow it is easier to match your seam.
Picture
Sew around the circles, clip the curves and turn the pillow. Stuff it and sew the opening closed.
Picture
Now you have a finished bolster pillow.  These are really nice when lounging on your favorite couch or chair.  I am using this one in my studio at my desk chair for lower back support.  
Picture
Here is a graphic if you want to try to create your own circle template. I also have a PDF download below. If you print it out, use the one inch scale to make sure it is accurate.  Then trace over it onto one of the Dollar Tree Cutting Mats.  I also have a You Tube video that shows the template in action and sewing the pillow. I hope you have enjoyed this post, share what you learn and are generous with what you create. Someone will appreciate your hard work!
circle_template.pdf
File Size: 161 kb
File Type: pdf
Download File


Comments are closed.

    Follow Me On Facebook

    Author

    Lagniappe Peddler believes that the process of working with our hands can be one of the best forms of healing the hurts in our lives and welcomes all who visit this safe little corner of the world.

    What is a Lagniappe Peddler?

    ˌlanˈyap,ˈlanˌyap - something given as a bonus or extra gift
    ped-ler - a person who offers merchandise for sale or promotes something

    Archives

    January 2023
    December 2022
    November 2022
    October 2022
    September 2022
    August 2022
    July 2022
    June 2022
    May 2022
    April 2022
    March 2022
    February 2022
    January 2022
    December 2021
    November 2021
    October 2021
    September 2021
    August 2021
    July 2021
    June 2021
    May 2021
    April 2021
    March 2021
    February 2021
    January 2021
    December 2020
    November 2020
    October 2020
    September 2020
    August 2020
    July 2020
    June 2020
    May 2020
    April 2020
    March 2020
    February 2020
    January 2020
    December 2019
    November 2019
    October 2019
    September 2019
    August 2019
    July 2019
    June 2019
    May 2019
    April 2019
    March 2019
    February 2019
    December 2018
    October 2018
    September 2018
    August 2018
    July 2018
    June 2018
    April 2018
    March 2018
    February 2018
    November 2017
    October 2017
    September 2017
    August 2017
    July 2017
    June 2017
    May 2017
    March 2017
    February 2017
    December 2016
    November 2016
    October 2016
    September 2016
    August 2016
    June 2016
    April 2016
    March 2016
    February 2016
    January 2016
    December 2015
    November 2015
    October 2015
    August 2015
    July 2015
    June 2015

    Blog Categories

    All
    Amore Restore
    Home And Garden
    Knitting
    Machine Embroidery
    Quilting
    Sewing

    Picture

    This website uses marketing and tracking technologies. Opting out of this will opt you out of all cookies, except for those needed to run the website. Note that some products may not work as well without tracking cookies.

    Opt Out of Cookies

Lagniappe Peddler LLC

Picture
© COPYRIGHT 2015-2023. ALL RIGHTS RESERVED.