Go Back  Quiltingboard Forums > Main
8 1/2" Nine Patch Block >

8 1/2" Nine Patch Block

8 1/2" Nine Patch Block

Old 02-16-2013, 03:45 PM
  #1  
Super Member
Thread Starter
 
chickadeee55's Avatar
 
Join Date: Oct 2010
Location: Waupaca Wisconsin
Posts: 1,302
Default 8 1/2" Nine Patch Block

Hi,

Can anyone tell me what size blocks I would need to make a finished 8 1/2" nine patch block. If possible I will try to use strips, but I can't figure out what the width of the strips need to be to get a finished 8 1/2" block after sewn together.

The closest I came up with was 3 inch strips, three sewn together would give me a finished 8" block, I am not sure that is correct.
chickadeee55 is offline  
Old 02-16-2013, 04:03 PM
  #2  
Senior Member
 
fatquarters's Avatar
 
Join Date: Sep 2010
Posts: 833
Default

I think 3-3' would give you a 71/2 "....3- 3 1/2" would give you 9"...3 - 3 1/4 would give you 8 1/4. Soooo ....maybe 3 3/8????


I might do the 3 1/2 and trim????
fatquarters is offline  
Old 02-16-2013, 04:14 PM
  #3  
Super Member
 
Join Date: Sep 2010
Location: Keller, TX
Posts: 7,417
Default

3 5/16 is what EQ7 says. Make a test one first to be sure.
lfstamper is offline  
Old 02-16-2013, 04:16 PM
  #4  
Senior Member
 
nvb50's Avatar
 
Join Date: Sep 2012
Location: Kankakee County in Illinois
Posts: 494
Default

Each strip would need to be 3.3333 inch. If I calculated correctly. 8.5 plus .25 time 2 for each block equals 10 inches.
10 divided by 3 equals 3.33333333333333333333333333
nvb50 is offline  
Old 02-16-2013, 04:25 PM
  #5  
Super Member
 
Join Date: Feb 2011
Location: S. Texas
Posts: 2,337
Default

Just do 3.33333333 and sew a scant bigger seam
mucky is offline  
Old 02-16-2013, 05:08 PM
  #6  
Super Member
 
Join Date: Feb 2011
Location: S. Texas
Posts: 2,337
Default

Trimming would make only the outside squares smaller
mucky is offline  
Old 02-16-2013, 05:13 PM
  #7  
Power Poster
 
dunster's Avatar
 
Join Date: Mar 2009
Location: Lake Elsinore, CA
Posts: 14,200
Default

3 1/3 is correct, but are you sure you want the block to be 8.5" finished? You mentioned that you thought three 3" strips would give you 8" finished, but that's incorrect; each 3" strip would be 2.5" finished, so you would get a 7.5" finished block, 8" unfinished.

For any FINISHED block size, if you want a 9-patch you need to divide the FINISHED block size by 3, then add 1/2 to get the strip size. Conversely, for any strip size, subtract 1/2 and then multiply by 3 to get the FINISHED 9-patch block size. For instance, for an 9" FINISHED block you need to divide 9 by 3 (giving 3) and add 1/2 (giving 3 1/2).

8.5 is a very unusual size for a finished block. Nothing really goes into 8.5 very nicely. If you look at Marcia Hohn's Quilter's Cache site, you won't see any blocks that are 8.5".
dunster is offline  
Old 02-16-2013, 05:14 PM
  #8  
Power Poster
 
dunster's Avatar
 
Join Date: Mar 2009
Location: Lake Elsinore, CA
Posts: 14,200
Default

Originally Posted by mucky View Post
Just do 3.33333333 and sew a scant bigger seam
Don't sew a bigger seam, because you really do want the strips to be exactly 3 1/3 inches, using 1/4" seams, to get a block that is 8.5" finished.
dunster is offline  
Old 02-26-2013, 07:28 PM
  #9  
Member
 
Join Date: Feb 2011
Location: Sun Lakes, AZ
Posts: 35
Red face

This was IMMENSLY helpful and timely for me! Thank you all, especially dunster! The reason I require the oddball 8.5" finished nine-patch block, is that I'm cutting multiple fat quarters into four 9" square blocks which will be alternated with nine-patch blocks to make a patchwork-looking picnic blanket. Thanks to you all...

Last edited by kaleda; 02-26-2013 at 07:29 PM. Reason: clarification
kaleda is offline  
Old 02-26-2013, 08:21 PM
  #10  
Junior Member
 
Join Date: Feb 2013
Location: Central Maryland
Posts: 230
Default

Dunster - thank you so much. I am a little rusty in my 'quilter's math' and that last block I made, I had to draw it out to make sure that I had the correct block size for a donation block. I was thinking of making some 9 patches next and your directions were very timely

Sylvia
MothrNatr is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
bearisgray
General Chit-Chat (non-quilting talk)
59
08-31-2015 06:14 PM
vjohn1006
Pictures
111
07-26-2014 03:14 AM

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.