The shape calculator is used to perform 2 types of calculations.
First, given one dimension of a shape,
it will calculate the other dimensions for that shape.
For example, suppose you have a Half Square Triangle and know the length of the side of the triangle,
but want to know the length of the diagonal.
The shape calculator will do that quickly and easily.
As another example, a hexagon has side, width and heighth dimensions.
As long as you know one of these dimensions,
the shape calculator will calculate the other two for you.
The second calculation is suppose you have a certain sized shape and now want to know the dimensions of that shape if you make it a certain amount larger or smaller. The shape calculator will calculate those dimensions for you! The classic quilting use for this calculation is for seam allowances. So, for example, suppose you have a 45 degree diamond and want to know the dimensions of a 45 degree diamond when you add a 1/4" seam allowance. The shape calculator will do the math for you. The calculator is versatile allowing you to specify whether you want to add or subtract that allowance.
Having a problem with a calculator
or have a suggestion?
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This calculator is designed and copyrighted by Quilter's Paradise. It is available free to use strictly for non-commercial, personal purposes only. Quilter's Paradise makes no warranty or representation as to the calculator's quality, performance or accuracy, and, in no event, will be liable for any damages resulting from its use. When calculating the amount of fabric required, the calculators calculate what is needed given the information provided. The user of the calculator is responsibile for determining if they want to add additional "just in case" fabric to the calculation and, if so, how much. The user assumes the entire risk as to the calculator's quality, performance and accuracy.
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Web site last updated April 20, 2022
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