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THE FEUTEX TOOLKIT

Curtain Stackback Window Clearance

Estimate visible window width after open curtains stack at both ends of an extended rod.

Home workspace● Runs in your browser
01 Your input
02 Your result
View or copy raw result data
FormulaTotal window width covered by stacks = 2*Math.min(window/2,Math.max(0,stack-extension)); Visible window width = Math.max(0,window-2*Math.max(0,stack-extension)); Rod length excluding finials = window+2*extension

Made for real tasks

  • Estimate visible window width after open curtains stack at both ends of an extended rod.
  • Compare an alternative set of measurements without uploading personal data.
Explore step-by-step workflows →

Worked example

Inputs

Window opening width
160 cm
Rod extension beyond each side
20 cm
Open curtain stack width per side
30 cm

Expected results

Total window width covered by stacks
20 cm
Visible window width
140 cm
Rod length excluding finials
200 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 window opening width, rod extension beyond each side, and open curtain stack width per side in the displayed units.
  2. Calculate and use each labeled result for curtain stackback window clearance. Compare the result with a measured sample before committing materials.

Try this example

{
  "window": 160,
  "extension": 20,
  "stack": 30
}

Accuracy and scope

Front-view width estimate using measured stackback; wall space, rod support and fabric fullness are separate.

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.