Estimate the fabric yards needed to make curtains.
The fullness factor inflates the needed width so curtains hang with soft gathers. Panels are the width divided by fabric width, and length sets the yards per panel. Curtains need more than the window width to drape well, so the fullness factor is what keeps them from looking flat and skimpy.
Curtain Fabric
Fabric = panels x (curtain length / 36)
Fabric = panels x (curtain length / 36) The fullness factor inflates the needed width so curtains hang with soft gathers. Panels are the width divided by fabric width, and length sets the yards per panel.
Curtains need more than the window width to drape well, so the fullness factor is what keeps them from looking flat and skimpy.
This calculator takes 4 inputs: Window width, Curtain length, Fullness factor, Fabric width. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.