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How much backing for a king size quilt?
King quilts need 9 to 14 1/4 yd of backing fabric, or 6 to 7 1/8 yd of 108″ wide backing. The most common king size, 108″ × 108″, takes 9 3/4 yd.
Every king size
| Quilt | 42″–44″ fabric | Seams | 108″ wide | Metric (110 cm) |
|---|---|---|---|---|
| 100 × 100 | 9 yd | 3 panels, vertical seams | 6 yd | 8.3 m |
| 108 × 108 | 9 3/4 yd | 3 panels, vertical seams | 6 1/2 yd | 8.9 m |
| 110 × 110 | 9 7/8 yd | 3 panels, vertical seams | 6 5/8 yd | 9.0 m |
| 120 × 120 | 14 1/4 yd | 4 panels, vertical seams | 7 1/8 yd | 13.1 m |
Each size allows 4″ extra on every side for quilting (most long-arm quilters ask for 4″–6″) and about 40″ of usable width from 42″–44″ cotton. Open a size for the step-by-step math and other overhangs.
Which king size is yours?
Sizes depend on the mattress and how far you want the quilt to hang. See what size quilt for a king bed for every drop, or the full quilt size chart. Same quilts: how much binding for a king quilt, batting and all the fabric.
Questions quilters ask
How much backing do I need for a king size quilt?
9 to 14 1/4 yd of 42-44 inch quilting cotton, depending on the size. A 108 x 108 inch king quilt needs 9 3/4 yd (3 panels, vertical seams), allowing 4 inches extra on every side for quilting.
How much 108 inch wide backing for a king quilt?
6 to 7 1/8 yd. Larger king sizes are wider than 108 inch fabric once the overhang is added, so they need two widths with one seam.
Which way should the seams run on a king quilt backing?
For 108 x 108, both directions take 9 3/4 yd, so choose whichever you prefer.
Try your own numbers
Updated 2026-11-14. How we calculate.
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