Go Back  Quiltingboard Forums > Main
Fabric Math Help Needed Please >

Fabric Math Help Needed Please

Fabric Math Help Needed Please

Old 02-12-2013, 03:51 AM
  #1  
Senior Member
Thread Starter
 
stitchengramie's Avatar
 
Join Date: Jan 2011
Location: Allegan, MI
Posts: 717
Default Fabric Math Help Needed Please

I am trying to figure out how much fabric that I need to buy for a quilt backing that 115 X 115? The fabric is only 42".
stitchengramie is offline  
Old 02-12-2013, 04:07 AM
  #2  
Senior Member
 
Drue's Avatar
 
Join Date: Sep 2011
Location: Grapeland, Texas
Posts: 573
Default

I figure about 8 3/4 yards.
Drue is offline  
Old 02-12-2013, 04:30 AM
  #3  
Junior Member
 
Join Date: Jul 2010
Posts: 175
Default

Using my Robert Kaufman app, it says 9 5/8 yds. That's with no allowance for overage. Allowing for 3" of overage on each side, 10 1/8 yds.
sandyms is offline  
Old 02-12-2013, 05:01 AM
  #4  
Super Member
 
Join Date: Aug 2010
Location: Delmarva Peninsula
Posts: 1,151
Default

13 2/3 yards which is what my Quilter's Fabricalc came up with. I find this calc to be very generous with the backing.
nhweaver is offline  
Old 02-12-2013, 05:31 AM
  #5  
Senior Member
 
giquilt's Avatar
 
Join Date: Oct 2012
Location: Middle TN
Posts: 943
Default

To get the length you need add the extra fabric around the edge of your top, usually 4" for hand/domestic quilting. 6-8" LA.
DSM--- 115+4=119. Width: Divide 119/40=~3 (you will loose almost 2 inches in selvage/seams) for # repeats of fabric. Length: divide 119/36 = 3.33 or 3 1/3. Next multiply length x width. 3*3 1/3= 10 yards.
LA---115+8=123. W: 123/40=~3.02. L:123/36=~3.42. WxL=3.02x3.42= 10.33, I would round to 10 1/2 yds.
giquilt is offline  
Old 02-12-2013, 05:56 AM
  #6  
Senior Member
 
Join Date: Jul 2010
Posts: 321
Default

I calculated the same as giquilt, so I would definitely get at least 10.5 yards--and if the binding is going to be made out of the backing material, I would get an extra 3/4 yards for that.
WandaVA is offline  
Old 02-12-2013, 06:17 AM
  #7  
Super Member
 
GingerK's Avatar
 
Join Date: Jul 2010
Location: Ontario, Canada
Posts: 2,707
Default

I would figure 40" useable. That would mean 3 widths. Then you need 115 x 3 for the length. That is 345 inches, divided by 12 inches which gives you just under 30 feet divided by 3 feet to the yard is 10 yards. Is my math right??
GingerK is offline  
Old 02-12-2013, 07:04 AM
  #8  
Super Member
 
Scissor Queen's Avatar
 
Join Date: Jul 2009
Location: Southwest Kansas
Posts: 4,820
Default

You take the length you need and divide it by 36. I'd add 10 inches to your length to allow enough extra for quilting. So that's 125 divided by 36. That's 3.4. So I'd round up to 3.5 yards length. You'll need three widths of fabric to cover 115 inches but it won't be quite 10 inches extra.

The two base number are always 36 inches in a yard and 40 inches of useable fabric width.
Scissor Queen is offline  
Old 02-12-2013, 07:40 AM
  #9  
Super Member
 
PolkaBabe's Avatar
 
Join Date: Dec 2010
Location: Iowa City, IA.
Posts: 1,075
Default

I agreed with SissorQueen. I sell fabric almost everyday.
PolkaBabe is offline  
Old 02-12-2013, 07:50 AM
  #10  
Super Member
 
Join Date: Nov 2008
Location: Duluth/ Superior, WI
Posts: 1,032
Default

You will need 10.5 yards cut into 3 equals lengths of 3.5 yard each.
QuiltNama is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
michelleoc
Main
8
08-03-2014 08:38 AM
Kristin in ME
Main
12
10-15-2011 09:48 AM
jaciqltznok
Main
4
05-18-2011 07:43 PM
Deedles
Main
3
08-16-2010 10:07 AM
jetnica
Main
5
03-31-2010 05:54 PM

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


FREE Quilting Newsletter


SEO by vBSEO ©2011, Crawlability, Inc.