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THE FEUTEX TOOLKIT

Envelope Pillow Back Panels

Calculate front and overlapping back panel dimensions from a finished cushion cover and chosen seams.

Crafts workspace● Runs in your browser
01 Your input
02 Your result
View or copy raw result data
FormulaFront cut width = width+2*seam; Front cut height = height+2*seam; Each back panel cut height = (height+overlap)/2+seam+hem

Made for real tasks

  • Calculate front and overlapping back panel dimensions from a finished cushion cover and chosen seams.
  • Compare an alternative set of measurements without uploading personal data.
Explore step-by-step workflows →

Worked example

Inputs

Finished cover width
45 cm
Finished cover height
45 cm
Finished back overlap
12 cm
Edge seam allowance
1 cm
Back opening hem allowance
3 cm

Expected results

Front cut width
47 cm
Front cut height
47 cm
Each back panel cut height
32.5 cm

Load the example in the workspace to reproduce these results. Display rounding does not change the underlying calculation.

How to use this tool

  1. Enter finished cover width, finished cover height, finished back overlap, edge seam allowance, and back opening hem allowance in the displayed units.
  2. Calculate and use each labeled result for envelope pillow back panels. Compare the result with a measured sample before committing materials.

Try this example

{
  "width": 45,
  "height": 45,
  "overlap": 12,
  "seam": 1,
  "hem": 3
}

Accuracy and scope

Two equal envelope panels with horizontal overlap; insert fullness and fabric stretch are not inferred.

Is my data uploaded?

This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.