Should batting be larger than the quilt top?
Yes. Extra batting gives room for quilting, shifting, and trimming.
Free quilting calculator
Quilt Batting Calculator
Find the batting size to prepare for quilting. The default adds 4 inches per side, which is a common planning estimate for many quilt projects.
Result
Batting estimate
Plan for batting at least 58" × 68".
- Batting width
- 58"
- Batting length
- 68"
- Selected roll width
- 96"
- Length to buy
- 2 yards
Choose a batting package or roll cut that is at least this wide and long.
Formula
Batting width = quilt width + overage × 2. Batting length = quilt length + overage × 2.
Example calculation
A 50" × 60" throw quilt with 4" extra per side needs batting at least 58" × 68".
Results are planning estimates. Always round up when buying fabric, especially for directional prints, shrinkage, fussy cutting, or cutting mistakes.
Related calculators
Quilt Backing CalculatorCalculate quilt backing fabric in yards using quilt width, length, backing overage, and common fabric widths like 44 inch and 108 inch.Quilt Binding CalculatorFind the binding length, number of WOF strips, and fabric yardage needed for your quilt binding.Quilt Size CalculatorChoose a quilt type or enter custom dimensions to estimate finished quilt size, backing, batting, and binding needs.
Frequently asked questions
Is 4 inches per side always enough?
It is a common planning estimate, but longarm quilters may request a specific overage.
Can batting be pieced?
Many quilters piece batting for smaller projects, but follow batting manufacturer guidance.
Does the calculator include shrinkage?
It does not estimate shrinkage. Add extra if you prewash or expect notable shrinkage.