What curtain fullness means
Fullness is the relationship between the width of your installed hardware and the amount of curtain across it. Too little can look flat; too much can feel bulky.
Our calculator starts with your real track or rod measurement, then guides you through opening style, installation and finished length. The same measurement engine powers every calculator on this site.
Measure installed hardware, not the window glass
For the most useful result, measure the complete working width of the installed track or rod. Do not add fullness yourself—the calculator handles the recommended finished width.