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Backing & Batting Calculator

Enter your quilt size and your fabric's width — any width works — and we'll also show the 108" wide backing option, plus the batting size you need.

Quilt Length (inches):

Quilt Width (inches):

Overage Per Side (inches):

Width of Backing Fabric (inches):

Batting Type:

Standard Batting Packages:

  • Crib: 45" × 60"
  • Twin: 72" × 90"
  • Full: 81" × 96"
  • Queen: 90" × 108"
  • King: 120" × 120"

Tip: Longarmers typically need 4" of overage per side; 2" is usually enough on a domestic machine. Backing is pieced from full-width panels in whichever direction uses the least fabric. Some quilters pre-soak batting to remove shrinkage before quilting.