How to use this calculator
Select your project type, choose your fabric bolt width, and enter the relevant measurements. The calculator shows total linear yards needed, number of cuts from the bolt, and a recommended purchase amount that includes waste allowance.
For curtains, measure your window width and desired finished panel length. Choose a fullness multiplier (2x is standard) and the number of panels. For tablecloths, enter your table dimensions and how far you want the fabric to hang over the edge (the drop).
Understanding fabric bolt widths
45 inch bolts are most common for quilting cotton and lightweight dress fabrics. They require more linear yardage since each cut is narrower, meaning more seaming for wide projects like curtains.
54 inch bolts are the standard for home decor and upholstery fabric. This width works well for curtain panels and tablecloths, often reducing the number of seams needed.
60 inch bolts are common for apparel fabrics and some specialty materials. The extra width can save significant yardage on wider projects.
Frequently asked questions
What is fabric fullness for curtains?
Fullness is the ratio of total curtain fabric width to window width. A 2x fullness means your curtains use twice as much fabric as the window is wide, creating soft, elegant folds. Standard is 2x to 2.5x. Flat, casual panels use 1.5x. Heavily gathered or luxurious drapes use 3x.
How do I account for pattern matching?
Measure the vertical pattern repeat (the distance before the pattern starts over). Add one full repeat to each cut length. For example, if your cut is 90 inches and the repeat is 24 inches, you need 114 inches per cut. This ensures patterns align perfectly across seams and between panels.
What are standard fabric bolt widths?
The three most common widths are 45 inches (quilting cotton), 54 inches (home decor and upholstery), and 60 inches (apparel and knits). Bolt width directly affects how much linear yardage you need, so always check before purchasing.
How much extra fabric should I buy?
Buy at least 10% extra for solid fabrics. For patterned fabrics, buy 15% to 20% extra to allow for pattern matching. If you plan to pre-wash the fabric, add another 5% for potential shrinkage. Running short mid-project is far worse than having leftover fabric.