All tools
Menu
Reference Start with backing

Batting size

Set batting dimensions from quilt top size and a separate batting overhang.

Measurements

Editable example inputs. Adjust them for your project.

Input guidance and units

Enter inches unless a field says otherwise. The result keeps the theoretical quantity separate from purchase rounding.

Enter fractional inches as decimals: 1/8 = 0.125, 1/4 = 0.25, 1/2 = 0.5. Dimensions and yard increments use steps of 0.125; counts use whole numbers. Fraction text such as 1/8 is not accepted in number fields.

What this calculator answers

Set the batting rectangle from the quilt-top dimensions and a separate batting overhang. The result is a target size, not a package or roll purchase.

How to use it

  1. Enter measured quilt-top width and length.
  2. Enter batting overhang on each side.
  3. Calculate the target batting rectangle, then check stock separately if needed.

Formula and variables

Required batting width = quilt-top width + 2 × batting overhang. Required batting length = quilt-top length + 2 × batting overhang.

Quilt topin
Assembled top dimensions before layering.
Batting overhangin per side
Extra batting on each side of the top.
Required battingin
Target cut rectangle.

Independent example

60 × 80 in quilt top with 4 in batting overhang per side.

Add 2 × 4 = 8 in to each dimension: batting target = 68 × 88 in.

  • 68 × 88 in required batting

What the result means

Confirm the overhang with the project or quilter. Batting and backing allowances are separate choices.

Common questions

Does this select a package size?

No. Use the package-fit tool with actual listed package dimensions.

Is batting overhang the same as backing overhang?

They are separate inputs and may be set differently for the project.

Method notes and unresolved issues

Use measured usable dimensions and the construction method named on this page. Example inputs are optional and are not universal standards.

Continue with the method

Keep the next decision close to the calculation.

Batting roll yardage Plan a roll cut from required batting dimensions, with one-piece fit as the default. Batting package fit Check whether a batting package covers the dimensions your quilt needs. Batting package sizes Check manufacturer-listed package dimensions before comparing them with your target. Quilt preparation checklist Record project-specific backing and batting requirements before handoff. Will One Batting Package Fit Your Quilt? Compare a required batting rectangle with a package’s listed dimensions, including a 90-degree rotation and any shortfall.