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HST + QST Calculator + Magic 8 (eight at a time) Calculations
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Here's a handy spreadsheet to help you with your next project that demands half
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square triangles (HST's) or quarter quare triangles (QST's and spawned from HST's)
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https://leisa-land.blogspot.com/
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Tiny URL you can share
https://tinyurl.com/HST-QST-Calc
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PSA Announcement: Make test blocks first before mass production!!!!!!
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HST'sQST's
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Desired Block Finish (enter your number here)4"6"
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Desired Block Trimmed (+.5 seam allowance)4 4/8"6 4/8"
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2 X Seam Allowances:
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 No Trim seam allowance 7/8"1 2/8"
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 TRIM DOWN seam allowance (mere mortals) (1)1"1 4/8"
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Square Dimensions
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 No Trim seam allowance 4 7/8"7 2/8"
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 TRIM DOWN seam allowance (mere mortals) (1)5"7 4/8"
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Magic 8 method (8x method). See cut diagram below10"15"
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(1) These measurements produce optimal results (accurate block/less waste) (+.25 HST +.5 QST). Though, your mileage/comfort may vary (make test block first and adjust accordingly by editing "Generous Seam Alowance" to suit YOU.
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Note: 2 HST's are needed for every QST block. If you need 20 QST's you will need to make a quantity of 40 QST's under your finished block size
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Magic 8 Cut Diagram
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Make horizontal and vertical bisecting cuts first while unit is most stable.
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Watch this video to learn how to use the Creative Grids 4 in 1 Ruler
https://www.youtube.com/watch?v=RETkZz6x81g
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Cutting Tips: Get a Square up ruler with lines perpendicular to the diagonal (square or triangle)
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