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THE FEUTEX TOOLKIT

Bias Strip Square Size

Estimate the square of fabric required for a desired length of continuous bias strip, allowing for unusable seam area.

Crafts workspace● Runs in your browser
01 Your input
02 Your result
View or copy raw result data
FormulaMinimum square side = Math.sqrt(length*width/(1-loss/100)); Fabric area = length*width/(1-loss/100)

Made for real tasks

  • Estimate the square of fabric required for a desired length of continuous bias strip, allowing for unusable seam area.
  • Compare an alternative set of measurements without uploading personal data.
Explore step-by-step workflows →

Worked example

Inputs

Required bias strip length
600 cm
Cut strip width
5 cm
Unusable area allowance
10 %

Expected results

Minimum square side
57.73502692 cm
Fabric area
3333.333333 cm²

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 required bias strip length, cut strip width, and unusable area allowance in the displayed units.
  2. Calculate and use each labeled result for bias strip square size. Compare the result with a measured sample before committing materials.

Try this example

{
  "length": 600,
  "width": 5,
  "loss": 10
}

Accuracy and scope

Area-based lower bound for continuous bias construction; square up the cloth and add a practical cutting margin. Not a strip-by-strip cutting diagram.

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.