Question: how to calculate how many yards of fabric needed for curtains?
Answer: Add 1 extra yard (or one vertical repeat of the fabric) per pair if using a large print fabric. For example, if you wanted a pair of curtains that were 90" in length, then 90+16=106 divided by 36 = 2.94 which you would round up to 3 yards of fabric per curtain, 6 yards total for the pair.