Monday, November 14, 2011

Quilt Math

I thought it might be useful to post some basic "quilt math" that I take for granted.  

How many binding strips do I need?
[( Length + Width) * 2 ] / 40 = Number of Strips
Okay it is not as complicated as it looks.  Get the length of your quilt in inches and add the width, multiply that number by two then divide it all by 40.  Round that number up to the next whole number and you have your number of strips.  The 40 is based on 42/44 inch fabric,  I round it down to keep myself out of trouble.  If you are using some oddball width fabric adjust the 40 as needed.

How much fabric do I need for Binding?
Number of Strips * Width of Strips
Take the number you got from our strip calculation and multiply it by the width of your preferred binding strip.
Consult your friendly local shop keeper if you have trouble converting inches to yards, round up to the nearest 1/4 yard to avoid shortcomings.

Both of these calculations can also be used to figure borders.  I know that most you don't really care about these calculations, but at least now you will know what is rattling through my brain when you ask me to cipher your quilt.

Remember, if it ain't fun you are doing it wrong.


  1. I'm still going to look at you with the deer in headlights look and have you do the math....this does not let you off of the hook, but nice try.

  2. I know, it is easier to ask the great and powerful Oz. But now you know what goes on behind the curtain, and if you see smoke billowing out of my ears you know the complex equations I am trying to solve.