How Much Batting for a Full Quilt?

A full quilt needs a 92 by 98 inch rectangle of batting, and those two numbers are what make this size awkward. Ninety-two inches is 2 inches wider than the roll most shops stock, and the precut sold as full is smaller than the quilt it is named for. Here is how much batting for a full quilt actually takes, and what to buy instead.

The Cut Size for a Full Quilt

A full quilt finishes at 84 by 90 inches: a 54 by 75 inch mattress plus 15 inches of drop per side and at the foot. Add the usual 4 inches of batting overage per side and the cut becomes:

• Width = 84 + 8 = 92 inches
• Length = 90 + 8 = 98 inches

That is 9,016 square inches of batting. Longarm quilters usually ask for 6 to 8 inches per side, which pushes the same quilt to 96 by 102 or 100 by 106 inches — and past every precut on the shelf.

Why a 90-Inch Roll Cannot Cover It

Batting rolls are sold 90, 96, 108 and 120 inches wide. At 90 inches the cut fails in both directions: 92 inches is 2 too wide, and 98 inches is 8 too long. Turning the rectangle around does not rescue it, because 98 is still bigger than 90. This is also why the 90-inch roll that works for a twin XL, where the 78-inch cut fits across the bolt, stops here.

The fix is a wider roll, not more yards. A 96-inch roll takes the 92-inch width and you buy 98 inches of length, or 2.75 yards. A 108-inch roll is the same 2.75 yards, and leaves a 16-inch strip. A 120-inch roll lets you rotate the cut, but 92 inches still rounds up to 2.75 yards, so turning it saves nothing here — on a twin XL the same trick saves three quarters of a yard.

The Precut Named Full Is Too Small

Batting precuts are labelled by bed size, and the labels drifted. The full precut measures 81 by 96 inches: 11 inches narrow and 2 inches short of the cut this quilt needs.

The queen precut is the near miss: 2 inches narrow, 10 inches long. Piecing a 2-inch strip down a 108-inch edge is the worst kind of batting seam, which is why most quilters jump to the king precut — and throw away about 37 percent of it.

Batting by the Yard for Five Full Sizes

The cut grows with the top, but the yardage barely moves until the length passes 99 inches.

Two rows carry the surprises. The full precut only covers the smallest top on the list, and the first four sizes all cost 2.75 yards off a roll. The standard 84 by 90 is 2 inches past a 90-inch roll without costing more; only a 101-inch cut crosses into 3 yards.

When the Batting Is Two Inches Short

If a queen precut is already in the cupboard, 2 inches of missing width is survivable on a domestic machine: butt-join a strip with a wide zigzag or fusible tape and keep the join outside the quilting area. Do not try it on a bed quilt that will be washed hard. A joined edge can ridge, and the ridge lands where the binding pulls.

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