RC-009 | Quilt Planning
One of the most common quilting questions is also one of the hardest to answer with a single number: How much fabric do I need? The answer depends on the quilt size, block design, number of fabrics, usable width, directional prints, borders, binding and backing.
Quick answer
If you are following a pattern, use the yardage requirements in that pattern as your starting point. A well-written pattern has already converted the cutting plan into fabric requirements. If you are designing your own quilt, work from the actual cut pieces rather than guessing from the finished dimensions alone.
Why quilt size alone is not enough
Two 60-inch-by-72-inch quilts can require very different amounts of fabric. One might use large squares with little waste, while another uses triangles, fussy cutting or multiple borders that consume much more yardage.
What does usable width mean?
Standard quilting cotton is often around 43 to 45 inches wide before allowing for selvages. Patterns commonly assume a smaller usable width because selvages are removed and some allowance is needed for squaring.
See Fabric Grain, Bias & Selvage for more about usable width and WOF strips.
How to estimate yardage for repeated pieces
- List every cut size required from one fabric.
- Determine how many pieces fit across the usable width.
- Calculate how many rows of those pieces are required.
- Multiply the row count by the cut dimension in the lengthwise direction.
- Add a reasonable allowance for squaring and cutting error.
- Convert the total inches to yards.
This method is more reliable than multiplying finished quilt area by a generic factor because it reflects the actual cutting layout.
Directional prints can require extra fabric
If words, animals, trees, stripes or other motifs need to face one direction, pieces cannot always be rotated for maximum cutting efficiency. That can increase yardage significantly.
Fussy cutting can require extra fabric
When you center specific motifs inside blocks, the unused space between motifs becomes part of the cost of the design. Large-repeat prints can require considerably more yardage than ordinary patchwork.
How much fabric for borders?
Measure the quilt top after the center is assembled. Border requirements depend on the finished perimeter, border width and whether strips are cut crosswise or lengthwise. Long borders may need to be pieced.
Do not simply sew on a long strip and trim the excess if the quilt edge may have stretched. Measure first so the border helps stabilize the quilt.
How much fabric for binding?
Binding yardage depends on the quilt perimeter, binding strip width and whether the binding is cut straight grain or bias. Add all four side lengths to get the perimeter, then add extra length for joining strips and finishing the final overlap.
How much fabric for backing?
Backing must be larger than the quilt top. Standard-width quilting cotton often needs to be pieced, while wide-back fabric may cover many quilts with fewer seams.
If a longarm quilter will quilt the project, use their required extra allowance rather than a generic rule. See What Is Wide-Back Fabric?.
Should I buy extra fabric?
A modest cushion can be useful for squaring, shrinkage if you prewash, directional prints, fussy cutting and ordinary cutting mistakes. The amount depends on the project. Buying dramatically more than the pattern requires is usually unnecessary, but buying the exact mathematical minimum can be risky when the layout is tight.
What if fabric is sold in 1/4-yard increments?
At Let’s Make It!, fabric in our dedicated quilting fabric by the yard collection is sold in 1/4-yard increments. Multiple quantities of the same fabric are cut as one continuous piece whenever possible. That lets you match a pattern requirement closely without automatically buying a full extra yard.
Common yardage mistakes
1. Using full bolt width instead of usable width
Selvages and squaring reduce the width available for cutting.
2. Forgetting seam allowances
Finished dimensions are not the same as cut dimensions.
3. Ignoring directional layouts
Rotating pieces may not be an option.
4. Calculating backing from the unfinished top
Finish borders first, then measure the completed top.
5. Buying critical fabric in separate batches
Another bolt or print run may not be perfectly identical.
The bottom line
The safest way to calculate quilt fabric is to work from the cutting plan. Pattern yardage is best when you have a pattern; piece-by-piece layout is best when you are designing your own quilt. Account for usable width, direction, borders, binding and backing before ordering, and keep a small margin for real-world cutting.
Continue learning: What Is Quilting Cotton? | What Is Wide-Back Fabric?
