Quilt Backing Calculator
Calculate how much backing fabric you need and how to piece panels together.
Tip: Use 4" overhang for machine quilting, 6-8" for long-arm quilting.
How to Use
- Enter your finished quilt top width and length in inches.
- Choose your backing fabric width (44" is standard quilting cotton; 108" is wide backing).
- Set your desired overhang — typically 4" per side for machine quilting.
- Click Calculate Backing to see yardage and piecing instructions.
Common Quilt Backing Reference
| Quilt Size | 44" Fabric | 108" Fabric | Panels (44") |
|---|---|---|---|
| Baby (36"×45") | 1.5 yds | 1.5 yds | 1 |
| Throw (60"×80") | 5 yds | 2.5 yds | 2 |
| Full (80"×90") | 7.5 yds | 3 yds | 3 |
| Queen (90"×108") | 9 yds | 3.5 yds | 3 |
| King (108"×108") | 10 yds | 3.5 yds | 3–4 |
Piecing Tips
When piecing 44" backing panels, press seams open to reduce bulk. Place seams off-center so they don't run down the middle of your quilt. For a horizontal seam, cut two pieces each half the total length plus a few inches for seam allowance.