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Calculating the Number of Hexagons for a Quilt

 Calculate the number of hexagons required for a quilt. What you need to know is how big you want the quilt to be and what size hexagons you will be using.

The Variables

W = width of quilt

L = length of quilt

d = size of hexagon (finished)
(decimal, 1/4" hexagon is .25)

 Provide Quilt Parameters Quilt width: W = inch Quilt length: L = inch Hexagon size: d = inch The numbers # of columns: # of rows: # of hexagons: # of half hexagons: Actual size of quilt top Width: inches Length: inches

Figure 1

The Equations - Always round up to nearest whole number.

 # columns = X = W d * 1.732
 # rows = Y = 2L - d 3d
 # hexagons = L - 2d (2X-1) + X 3d
 # half hexagons = 2L - 4d 3d

Example (Double size quilt)

W = 80", L = 95", d = 1"

 # columns = X = W = 80 = 47 d * 1.732 1 * 1.732
 # rows = Y = 2L - d = 2(95) - 1 = 63 3d 3(1)
 # hexagons = L - 2d (2X-1) + X = 95 - 2(1) [2(47) - 1] + 47 = 2930 3d 3(1)
 # half hexagons = 2L - 4d = 2(95) - 4(1) = 62 3d 3(1)

Actual Size of Quilt

 W = Xd(1.732) = 47(1)(1.732) = 81.40"
 L = Y - 1 3d + 2d = 63 - 1 3(1) + 2(1) = 95" 2 2
 Standard Quilt Sizes Crib Twin Twin (Long) Double (Full) Queen King Mattress 27" x 52" 39" x 75" 39" x 80" 54" x 75" 60" x 80" 76" x 80" Quilt with Dust ruffle 30" x 54" 65" x 95" 65" x 100" 80" x 95" 86" x 100" 106" x 106"
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