Quilt block 1

The Quilt Block 1 calculator computes the size of each of the pieces of fabric needed to create the quilt block pictured. in Figure 1.  

INSTRUCTIONS:  Choose units and enter the following:

• (BW) Block Width

Piece Sizes:  The calculator returns the sizes and number of the pieces in the figure.

• (T) Triangles
• (SS) Small Squares
• (LS) Large Squares
• (R) Rectangles

The Math / Science

Description

Enter the overall width of the whole pattern desired and the equation will calculate the length of the following shapes:

• small squares (denoted SS in the output),
• large squares (denoted LS in the output),
• rectangles ( denoted R in the output) , and
• triangles  (denoted T in the output). 

Usage

 
In order to make this pattern, the following number of shapes need to be cut for each fabric.  

Fabric 1

• 8 Triangles of fabric 1 from four squares (`T_"C1"`)
• 4 Rectangles of fabric 1 from two squares (`R_"C1"`)
• 16  Small Squares of fabric 1 (`SS_"C1"`)

 Fabric 2

• 5 * Large Squares of fabric 2 (`LS_"C2"`)
• 16 Small Squares of fabric 2 (`SS_"C2"`)

Fabric 3

• 8 Triangles of fabric 3 from four squares (`T_"C3"`)

Fabric 4

• 4 Rectangles of fabric 4 from two squares (`R_"C4"`)

Default

[Example 15 inch block]  The default input for this equation is 15 inches, :

SS = 2.000 in | LS = 3.500 in | RW = 2.000 in | RL = 3.500 in | T (cut diagonal) = 3.875 in

This means:

• the small squares (SS) are 2 inches wide.  16 small squares (2 inches by 2 inches) of fabric 1 and fabric 2 will need to be cut.
• the large squares (LS) are 3.5 inches wide.  5 large squares (3.5 inches by 3.5 inches) of fabric 2 will need to be cut.
• the rectangle width (RW)  is 2 inches and the rectangle length is 3.5 inches.  4 rectangle (2 inches by 3.5 inches) of fabric 1 and fabric 4 will need to be cut.
• the triangles are cut from a square that is 3.875 or (3 7/8) inches on each side. Cut 4 squares (3 7/8 inches by 3 7/8 inches) of fabric 1 and  fabric 3 will need to be cut. Then cut each square in half along its diagonal to produce 8 triangles of fabric 1 and fabric 3.