Estimate Your Quilt Backing
Enter the finished quilt size. This tool adds extra backing for basting, quilting, and trimming.
- Recommended amount
- Buy 3 1/4 yards
- Required size
- 58" x 68"
- Cut length and piecing
- Cut 2 panels at least 58" long; join with 1 horizontal seam.
- Optional 5–10% extra
- Buy 3 1/2–3 3/4 yards if you want 5–10% extra margin.
Fabric may be rotated to use less yardage.
One-way print? Keep text or motifs upright: buy 4 yards instead.
Fabric may be rotated to use less yardage.
One-way print? Keep text or motifs upright: buy 4 yards instead.
Backing cuts include 4" extra on each side; each backing seam uses 1" of panel coverage. Estimates are for planning only. Check your pattern, fabric width, shrinkage, quilting method, and longarm requirements.
Quilt Backing Size Chart
| Quilt Type | Common Finished Size | Suggested Backing Cut Size | Regular Cotton Base (42") | Wide Backing Base (104") |
|---|---|---|---|---|
| Baby gift quilt | 36" x 45" | 44" x 53" | About 2 1/2 yards | About 1 1/4 yards |
| Lap quilt | 45" x 55" | 53" x 63" | About 3 yards | About 1 1/2 yards |
| Throw quilt | 50" x 60" | 58" x 68" | About 3 1/4 yards | About 1 3/4 yards |
| Large throw quilt | 60" x 72" | 68" x 80" | About 4 yards | About 2 yards |
| Twin quilt | 64" x 86" | 72" x 94" | About 5 1/4 yards | About 2 yards |
| Full quilt | 80" x 90" | 88" x 98" | About 7 1/2 yards | About 2 1/2 yards |
| Queen quilt | 90" x 100" | 98" x 108" | About 8 1/4 yards | About 3 yards |
| King quilt | 108" x 108" | 116" x 116" | About 9 3/4 yards | About 6 1/2 yards |
Regular Backing vs. Wide Backing
Regular cotton backing
Wide backing fabric
How this estimate works
- Backing cut size adds 4" to each side of the finished quilt.
- Backing width = finished quilt width + 8".
- Backing length = finished quilt length + 8".
- Each backing seam uses 1" of panel coverage.
- Yardage is a base planning estimate rounded up to the nearest 0.25 yard.
- Check pattern instructions, actual fabric width, quilting method, shrinkage, and longarm requirements before buying.
View assumptions
- Regular quilting cotton usable width: about 42"
- Wide backing usable width: about 104"
- Optional 5–10% extra shopping buffer is separate unless stated
FAQ
How much bigger should quilt backing be?
For beginner planning, many quilters add about 4" extra on each side. If you use a longarm quilter, ask for their specific backing requirements.
What size backing do I need for a 50" x 60" throw quilt?
Using 4" extra on each side, a 50" x 60" throw quilt needs a backing cut size around 58" x 68".
Can I use regular quilting cotton for backing?
Yes, but larger quilts may need pieced backing because regular quilting cotton is usually not wide enough for the whole backing in one piece.
Can this chart replace my pattern instructions?
No. This chart gives beginner planning estimates. Always check your pattern and fabric width before cutting.