Curtain Calculator
To determine how much fabric is required to cover a window, measure the window to be covered, and follow this step-by-step Curtain Calculator.
Curtains are really easy to make, and can save you a lot of money. Don't settle for only the cheap curtains you can find at the local big-box store. When you sew them yourself, you can get a better quality fabric and one you really like. Don't settle - make your own.
Curtain Formula
(Desired curtain height plus 16 inches) multiplied by (total width of all curtain panels times 3) divided by (the width of the fabric).
Example
For a window 48 inches high, by 30 inches wide, with curtain covering window plus 6 inches on all sides with 45 inch wide fabric:
Desired Height
48 inches plus 6 inches on top, plus 6 inches on bottom, equals desired height equals 60 inches
Total Width
30 inches plus 6 inches each side equals 42 inches equals total width
Formula
((60 in + 16 in)X(42 X 3))/45
= (76 X 126) /45
= 9576/45
= 212.8 inches
Convert Inches to Yards
inches/36 equals yards
= 212.8/36
= 5 yards