Quilt Batting Calculator
Enter your quilt size and this free calculator tells you the exact batting piece you need and how many linear yards to buy off the roll. It checks both orientations of the roll and warns you if your roll width will not fit.
Standard precut batting sizes
Batting is sold two ways: precut packages and cut-to-order off a wide roll. If the piece the calculator gives you fits inside one of these standard precut sizes, a package may be the easier buy:
| Package | Size | Typical quilt |
|---|---|---|
| Crib | 45 × 60" | Baby quilts up to about 39 × 54" |
| Twin | 72 × 90" | Twin quilts up to about 66 × 84" |
| Full | 81 × 96" | Full quilts up to about 75 × 90" |
| Queen | 90 × 108" | Queen quilts up to about 84 × 102" |
| King | 120 × 120" | King quilts up to about 114 × 114" |
"Typical quilt" assumes 3" of overage per side. If your long-armer wants 4", size down the quilt limit accordingly.
How the calculator works
- Add overage. Your overage is added to all four sides to get the piece size you actually need.
- Try both orientations. The piece can come off the roll either direction. The calculator uses whichever orientation fits your roll width and takes the least length off the roll.
- Warn on misfits. If your roll is narrower than the piece needs in either direction, it tells you to pick a wider roll or plan a seam instead of letting you buy the wrong amount.
- Round up. Linear yards are rounded up to the next ⅛ yard, the way batting is cut at the counter.
Batting questions, answered
What size batting do I need for my quilt?
Your batting should be larger than the quilt top on every side. Add 3 inches per side for domestic machine quilting, or 3 to 4 inches per side if a long-arm quilter will finish it. A 60 by 80 inch quilt needs at least a 66 by 86 inch piece of batting.
What are the standard precut batting sizes?
The industry standard precut sizes are Crib 45 by 60 inches, Twin 72 by 90, Full 81 by 96, Queen 90 by 108, and King 120 by 120. Compare the piece this calculator gives you against those sizes to see whether a precut package covers your quilt.
What widths does batting come in on the roll?
Common roll widths are 90, 96, 108, 120, and 124 inches. Buying off the roll is often cheaper per quilt than precut packages, especially for throws and baby quilts where one width covers the whole piece.
Can I piece batting scraps together?
Yes. Butt two straight edges together without overlapping and join them with a wide zigzag stitch or fusible batting tape. Pieced batting behaves fine inside a quilt as long as the edges do not overlap and the pieces are the same loft and fiber.
This is one of seven calculators inside Makerly.
The free version does one job well. Inside Makerly, the calculators work together: enter your quilt size once and backing, batting, binding, borders, on-point, yardage, and a full printable cut list all update from the same numbers.
- Save every quilt as a project, with its numbers attached
- Design the quilt first in the Block Designer, then let the math follow
- Track your fabric stash so you know what you already own
- Works in your browser and on iPhone and Android, always in sync
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