Can You Figure the Amount of Yardage to Buy?

What size is your bed?

Different sizes need different fabric requirements:

• Twin size bed = 63 X 87”• Double (full) size = 78” X 87”• Queen bed = 84” X 92”• King bed = 100” X 92”

• If your quilt pattern fits a twin size bed but you have a queen bed, what can we do to create it big enough for your bed?

How Well Do You Know Your Math?

• What do we call the different sides of a rectangle?

• Length• Width

• What is the general shape of a quilt?

• Rectangle

• What does the perimeter give you?

• All the lengths of the sides added together

• Does everyone remember the perimeter formula?

• Perimeter = 2(w) + 2(l)

• How many inches in a yard?

• 36”

• How do you convert 6 ft into inches?

• 6(12”) = 72”

This quilt is 70 X 86”.

• 2(w) + 2(l) = p• 2(70) + 2(86) = 312 inches

• If a twin size quilt is 63” x 87”, what is it’s perimeter?

• 2(63) + 2(87) = 300 inches• Could this quilt fit a twin size

bed?• Could it fit a double or full

size bed that is 78” X 87”?

86”

70”• What is the perimeter of this

quilt?

A queen size bed is 84” x 92” and our quilt pattern is 70” X 86”.

• If you add a 6.5 inch border to your quilt, could it fit a queen size bed?

• That would increase the size 6 inches because the seams are a quarter inch. 1/4 inch seam on the inside and outside edges equals 2/4 or 1/2.

• With Border, the quilt will be 82” x 98”.

Original quilt Queen size

New border added

70”

86”

6.5 “ border

NOW, how much fabric do we need to purchase for the border?

1. Find the perimeter plus the extra border length

2. P = 2(w) + 2 (l) + 4(b)

p = 2(70) + 2 (86) + 4(6.5)= 338 (total length)

• 338”/ 43” = 7.86 strips • So we will round up to 8

strips of 6.5” fabric needed for border.

A bolt of fabric is often called 45” wide fabric but it can vary in width from 42” to 45”. (the most common width is 44”)

Now we need to divide the total length by the 43” width of the fabric bolt. Round up to the nearest whole number.

Total border length/ bolt width

Now we need to figure out how many yards of fabric to purchase.

• Multiply the number of strips by the border width. (6.5”)

• How many yards should you purchase to cover the 52 inch length?

• 8 strips x 6.5” border width = length

• 52” / 36” =

52”

1 yard + 16”

• round up to 1 ½ yards

The same math principal applies to many things.

• What is the perimeter of a football field 360 ‘ x 160 ‘.

2(l) + 2(w) = feet1040

• You are going to put a 4” border around a bulletin board that is 4’ x 6’.

• What is the total length of border needed?

• 2(l) + 2(w) + 4(b) =

• 2(48) + 2(72) +4(4) = 256”

•So….. if you have a King size bed (100”x 92”), how would you now adjust a queen size quilt (84”x92”). to fit a king size bed?

1. What is the border width going to be?

2. What is the total length of border needed?

Queen

King

1. (100 – 84) / 2 = 8 (8 inch border)

2. The total length of the border will equal 2(l) = 2(92”)=184”

3. How many linear inches of the 44” wide bolt will we need?

4. How many yards is 40”?

3. The total length of the border will equal

2(l) = 2(92”) =184”

4. 40”/ 36” = 1 yd and 4”. Round up to 1 1/8 yards of

fabric needed to make a king size quilt.

Home work assignment:- Do #1 – 4 here and then….-Go home and measure one quilt from one of your beds. -Find the amount of fabric needed to purchase to add a border to your quilt.-You determine the size of border you want.