Curtains & Windows

Curtain Panel Calculator

Determine how many ready-made panels are needed to cover a rod at the desired fullness.

Free interactive tool

Enter your details

m
m
Method & guidance

How the Curtain Panel Calculator works

Required flat width is divided by one panel’s advertised flat width and rounded up.

How to use this tool

  1. Collect accurate values for rod width, flat panel width, desired fullness.
  2. Enter measurements in the displayed units and select the choices that match this project.
  3. Select Calculate / Generate, then compare the outputs with the stated Curtain Panel Calculator method.
  4. Apply the result only after checking product specifications and real site conditions.

Example calculation or use case

For a worked Curtain Panel Calculator example, use Rod width = 2.2 m, Flat panel width = 1.4 m, Desired fullness = 2. The tool then applies this method: Required flat width is divided by one panel’s advertised flat width and rounded up.

Frequently Asked Questions

What information does the Curtain Panel Calculator use?

It uses the measurements and choices shown in the form. Required flat width is divided by one panel’s advertised flat width and rounded up.

How accurate is the Curtain Panel Calculator result?

The calculation is mathematically consistent with the stated assumptions. Buy panels from the same batch and confirm whether listed width is flat or gathered. Real products, site conditions, and supplier specifications can still change the final decision.

Should I include an allowance?

Use the result as a planning baseline and keep a sensible reserve for site variation, delivery, or fitting.

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