Pre cut fabric conversion
#11
I wouldn't do the calculation of the yardage for precuts based on square inches. I would do it based on the number of pieces that are cut from one WOF. So, for a jelly roll, you get one strip from one WOF. I would assume that the useable WOF is 40", so for a layer cake of 10" squares, you can get 4 pieces from 1 WOF, and for a charm pack of 5" squares, you can get 8 squares from 1 WOF.
The next part is how many strips/pieces do you get in your precut pack. I've seen mostly 20-40, but others have reported other numbers of pieces, so you have to adjust for that.
40 2.5" strips is 40 *2.5" = 100"
divide by 36" for yards or 39.4" for meters
100"/36"/yd = 2.8 yd or 100"/39.4" = 2.6 meters
40 10" squares means 40/4/WOF or 10 strips at WOF 10 10" strips = 100", so same as above for 2.5" strips
40 5" squares means 40/8/WOF or 5 5" strips at WOF 5 x 5" strips = 25" of fabric
25"/36"/yd = 0.70 yards or 25"/39.4"/m = 0.64 meters
And you probably pay a premium for the pre-cuts, but you don't have to cut them yourself.
The next part is how many strips/pieces do you get in your precut pack. I've seen mostly 20-40, but others have reported other numbers of pieces, so you have to adjust for that.
40 2.5" strips is 40 *2.5" = 100"
divide by 36" for yards or 39.4" for meters
100"/36"/yd = 2.8 yd or 100"/39.4" = 2.6 meters
40 10" squares means 40/4/WOF or 10 strips at WOF 10 10" strips = 100", so same as above for 2.5" strips
40 5" squares means 40/8/WOF or 5 5" strips at WOF 5 x 5" strips = 25" of fabric
25"/36"/yd = 0.70 yards or 25"/39.4"/m = 0.64 meters
And you probably pay a premium for the pre-cuts, but you don't have to cut them yourself.
#14
Senior Member
Join Date: Feb 2013
Location: East Kootenays, BC
Posts: 947
I only buy precuts if they are discounted sufficiently to be somewhat comparative and usually cheaper in price if I bought the fabric off the bolt. What I do like about them, is the variety of coordinated fabrics you get in them that would be difficult to get when buying cuts off the bolt as often the vendors don't carry an entire collection to be able to do that off the bolt. However, now I have to find quilt patterns that I can use them in !
#16
Senior Member
Join Date: Apr 2009
Location: Bushkill, Pa
Posts: 534
There are 1584 sqin in a yard of fabric (36x44).
Layer cake with 40 pieces of fabric is 4000 sqin.
Layer cake with 42 pieces of fabric is 4200 sqin.
Charm pack (5") with 40 pieces of fabric is 1000sqin,
Charm pack with 42 pieces of fabric is 1050sqin.
Jelly roll (2.5"x44") with 40 pieces of fabric is 4400sqin.
If you divide these numbers with the sqin in a yard you will get fairly accurate yardage.
I hope this helps.
Layer cake with 40 pieces of fabric is 4000 sqin.
Layer cake with 42 pieces of fabric is 4200 sqin.
Charm pack (5") with 40 pieces of fabric is 1000sqin,
Charm pack with 42 pieces of fabric is 1050sqin.
Jelly roll (2.5"x44") with 40 pieces of fabric is 4400sqin.
If you divide these numbers with the sqin in a yard you will get fairly accurate yardage.
I hope this helps.
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