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Curtain Fullness and Panel Width Calculator
Curtain fullness is the finished fabric width divided by the covered track or rod width. A 2× fullness target needs twice the coverage width before hems, overlaps, and side returns are considered. This calculator adds those fixed allowances, then rounds up to complete panels so the installation closes fully without flattening the intended folds.
Planning estimate only. Check measurements and real-world constraints before buying materials or making a commitment.
Calculate your scenario
Change any input. Results update immediately.
Your results
Required finished fabric width
206.0 in
Includes fullness, overlap, and returns.
Panels required
4
Rounded up to complete panels.
Installed fullness
2.02×
Actual fullness after rounding panel count.
How the calculation works
The calculator applies this relationship to the inputs above. Keep every measurement in the unit shown.
Worked example
Use this example to check the calculator by hand before relying on a result.
Assumptions behind the result
- • Panel width is the finished usable width.
- • Fullness applies only to track coverage.
- • Overlap and returns are totals for the opening.
- • All panels share the same width.
- • Pattern matching and fabric length are calculated separately.
Mistakes that change the answer
- • Using window glass width instead of rod coverage.
- • Multiplying returns by fullness.
- • Treating package width as finished panel width.