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Calculator
Your mattress, your drop, your pillow style — the exact quilt size you need, plus how every standard size measures up on your actual bed.
Your quilt should measure at least
90" wide × 105" long
60"×80" mattress + 15" drop each side + 10" pillow tuck.
| Bed | Mattress | Quilt You Need |
|---|---|---|
| Crib | 28×52" | 58×77" |
| Twin | 39×75" | 69×100" |
| Twin XL | 39×80" | 69×105" |
| Full / Double | 54×75" | 84×100" |
| Queen | 60×80" | 90×105" |
| King | 76×80" | 106×105" |
| California King | 72×84" | 102×109" |
Assumes a 12″ mattress, standard 15″ drop, and a pillow tuck — the calculator adjusts all three. Compare against the standard quilt sizes chart.
Line up the top fabric while the numbers are fresh.
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For a queen mattress (60×80") with a standard 15-inch drop and a pillow tuck, you need a quilt about 90 inches wide by 105 inches long — which is why the standard queen quilt is 90×108". If your mattress is a thick pillow-top (14"+), add 2–4 inches of width, or use the calculator above with your actual mattress thickness.
An Eastern king mattress (76×80") with a standard drop and pillow tuck needs a quilt about 106×105" — the standard 108×108" king covers it comfortably. A California king (72×84") is narrower and longer, which is why it has its own standard: 104×114".
The three common choices: a coverlet drop just covers the mattress sides (mattress thickness plus an inch); a standard drop hangs a few inches below the mattress (10–18 inches depending on thickness); a floor-length drop adds the foundation height too (mattress thickness plus about 9 inches). Pick the style in the calculator and it presets the number for your mattress.
Only if you want the quilt's top edge to tuck under and fold back over the pillows — that takes about 10 extra inches of length. If your pillows sit on top of the quilt or you use shams, skip the tuck and save the length.
Often not on the width. A standard queen quilt (90") gives a 60-inch-wide mattress 15 inches of drop per side; a 16-inch-thick mattress swallows nearly all of it, leaving the quilt looking short. Enter your real thickness in the calculator — for very thick mattresses the fit report will steer you one standard size up, or to a custom width.
Use the twin mattress preset (39×75") with a small drop (8–10 inches) and no pillow tuck — a longer drop dangles into the lower bunk. That lands around 57×85", so a standard twin quilt (66×88") works if you tuck the extra, or size down toward a large throw.
Dimensions, bed fit, batting, and backing math for every size on the quilt sizes chart.