Standard Full Quilt Measurements

Full is the only standard bed size where the quilt comes out nearly square, and the first that outgrows a two panel backing. Both facts trace back to one number: a full mattress is only 54 inches wide. Here are the exact measurements and the arithmetic behind each one.

Full Quilt Measurements by Size

The figure to work with is 84 by 90 inches. The rows around it are the leaner coverlet and the deeper drops, and every one of them comes out of the same two lines of arithmetic, so you can land on any of them on purpose rather than by guesswork.

Side drop is half the difference between quilt width and the 54 inch mattress; foot drop is quilt length minus 75 inches. On a full bed the two usually match, which is not true of a twin or a queen.

Where the 84 by 90 Figure Comes From

Two lines of arithmetic produce it. Width has both sides of the bed to cover, so it is mattress width plus twice the drop: 54 + (2 × 15) = 84. Length hangs off one end only, so it is mattress length plus a single drop: 75 + 15 = 90.

The last row is the one worth noticing. At 21 inches of drop a full quilt lands on 96 by 96, exactly square. Square full quilts are ordinary; square quilts in other bed sizes are not, and this is the reason.

The Three Panel Backing Wall

A full quilt top is 84 by 90 inches and backing is cut 4 inches larger on every side, so the piece you need is 92 by 98 inches. Standard quilting cotton is 42 inches wide. Two panels give 84 inches, which covers a twin and a lap quilt, and falls 8 inches short here.

Three panels fix it, and the direction of the seams decides the yardage. Sew them into a 92 by 98 rectangle with horizontal seams and each panel is 92 inches long, so you buy 276 inches, or 7.75 yards. Rotate the seams and each panel is 98 inches long, which is 294 inches, or 8.25 yards — half a yard more for the same rectangle. Wide backing skips the question: 108 inch fabric covers 92 inches across, so you buy 98 inches, or 2.75 yards.

Why Full Quilt Charts Disagree

Three numbers circulate for a full quilt: 81 by 96, 84 by 90, and 78 by 87. None is a mistake: they come from different drop choices and different assumptions about whether the quilt folds back over the pillows. The 81 by 96 figure repeats most often, and it is also the size sold as a full batting precut, which suggests that number travelled from the batting aisle to the size charts.

Double is the same bed, so the quilts are identical. Charts sometimes print both names beside different numbers, which is how one mattress ends up with three official measurements.

Measuring Your Own Full Bed

Measure the bed made up the way you sleep in it, not the bare mattress. For width, add twice the drop you want to the 54 inch mattress; for length, add the foot drop plus any pillow tuck to the 75 inch mattress. A quilt that just reaches the bed rail reads 54 + 30 = 84 wide and 75 + 15 = 90 long, which is the standard size arrived at from the other direction. Feed that figure into the quilt size calculator to get a cut list before you shop.

Frequently Asked Questions