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Curtain fullness calculator

Use the working rod span and the flat width of a single ready-made panel to estimate how many panels a chosen fullness requires. Check the heading and pack contents before ordering.

Worked example

An 80 in working rod at 2× fullness calls for 160 in of flat fabric. Four 50 in panels supply 200 in and give 2.5× actual fullness, with two panels on either side.

Use this result

• How many curtain panels do you need for an 80-inch rod?
• Does curtain width on the packet mean one panel or the pair?
• Where do you measure curtain length with rings or clips?
• Will the curtains you already own fit a wider rod?
• How far should a curtain rod extend to leave the glass clear?