# How many yards do I need? :Borders

If your like me and math wasn’t your best subject in school, have no fear for Quilt Girl is here! She’s flown in special to show us how to calculate yardage for the dreaded 3B’s: borders, backing and binding. There will be three posts total breaking down each of the 3B’s.

Now what your going to need is a pencil, paper, calculator, your quilt top and something to measure it with (cutting mat or measuring tape), bottle of Advil or glass of wine.

Now just remember that you will be working in inches until the very last step when it will convert to yards.

First you need to decided one of two things: the size of the finished quilt or the size of your borders.

### Step 1: Find out how big your quilt top is.

Measure the Width and Length of the quilt to find your size. Let’s say it comes to 40×50 inches.

### Step 2: How big do you want your borders?

Let’s say you want a 5 inch border.

Now because there is two sides you will need to double the desired border size.

5 + 5 = 10

Take that number and add it to the width of the quilt.

40 + 10 = 50

We need to account for seam allowance so add 1 inch to that number.

50 + 1 = 51 inches

Here it is as a formula:

Border size x 2 = A

Width + A = B

B + 1 = C (New Width)

### Step 3: Repeat for Length.

Now we’re going to repeat the exact equation for the Length.

Border size x 2 = A

Length + A = B

B + 1 = C (New Length)

### Step 4:

Now you should have different numbers, for me its 51 as my width and 61 for the length.

Add those two numbers together: 51 + 61 = 112 inches

New Width + New Length = A

### Step 5: Time to convert.

I have to total amount of fabric I need in inches but I need it in yards. So I’m going to take my 112 inches and divide it by 36 (36 inches = 1 yard).

112/36 = 3.1

A/36 = Total yardage

Since I ended up with 3.1 yards I’m going to bump my final cut up to 3.25 yards because it never hurts to have a little extra.

When I get ready to cut my borders I’m going to cut 5.25 wide inch strips. (Remember to add that 1/4 inch for seam allowance!) I will then sew the strips together until I have 2 strips that are 61 inches long and 2 strips that are 40 inches. 40 inches! But I thought it should be 51 inches! A very common mistake, but no worries! Take the original width, which in my case was 40 and sew it on. Then take the New Length, 61, and sew it on.

Take a sip or two and Good Luck!

Kate

• Maureen

You really only need 1 yard to do these 5″ borders. It’s a 112″ total of fabric not of yardage. If your cutting 5.25″ borders and your width of fabric is 42″, that’s one cut for the top and one for the bottom or 10.5″. The sides are one and a half strips each, or 3 strips which is 16.25″ for a total of 27″ approximately. I hope that makes sense, that’s how I figure borders.

• AnnF

Agreed. I think the calculation presented works for backing…

• Kathleen

Thank you so much for all the great tutorials and instructions–they are so helpful. Unless I am misunderstanding, I think these instructions have an error. Borders can be cut crosswise grain. Roughly you can expect to get at least forty inches of border from each cut. Actually you need 224″ of 5.25 wide borders for the above quilt. By making 6 cuts each 5.25″ you will get at least 240″ of border, and you would need 31.5″ of fabric, rounding to 1 yard. Even if you cut them on the lengthwise grain you would need right at 1 yard.

• Sarah

Kate, by now you will have found that the math is wrong. If you add the raw length x2 with the raw width x2, plus the raw width of the border x4, that’s a pretty good starting point for the length of the border pieces, but we have to allow more for adjustments and joining pieces. Seam allowances should be 1/2 inch, 1/4 on each side. Assuming 1/2 inch seam allowances on your example, 40.5 x2 (=81) + 60.5 x2 (=121) + 5.5 x4 (=22) = 224 inches of border (before piecing together). Cutting cross-grain yields at least 40 inches, so divide 224 by 40 (5.6), that is, 5.6 strips 5 1/2 inches wide. But wait, we’re not done. You’ll have to piece the border fabrics together (I’m figuring on bias seams), so you’ll need an additional raw border width for each seam – 5.6 strips will need 5 seams to make one continuous piece, so add 5.5 x5 (=27.5) to the length you already figured (224 + 27.5 = 251.5) and divide 251.5 by the width of the fabric (40) = 6.2875 strips — round that up to 7. Seven strips x the width of the border (5.5) = 38.5 inches. Let’s round it up to 39 inches of border fabric. Knowing how cutters in the fabric store often cut wonky, give yourself some room and get 1 1/4 yards of border fabric, which would yield 8 strips if everything was cut perfectly, but we know it doesn’t ever work that way.