Home › Backing calculator › Twin size
How much backing for a twin size quilt?
Twin quilts need 5 1/2 to 6 3/4 yd of backing fabric, or 2 1/8 to 2 1/4 yd of 108″ wide backing. The most common twin size, 70″ × 90″, takes 5 1/2 yd.
Every twin size
| Quilt | 42″–44″ fabric | Seams | 108″ wide | Metric (110 cm) |
|---|---|---|---|---|
| 66 × 90 | 5 1/2 yd | 2 panels, vertical seam | 2 1/8 yd | 5.0 m |
| 70 × 90 | 5 1/2 yd | 2 panels, vertical seam | 2 1/4 yd | 5.0 m |
| 72 × 90 | 6 3/4 yd | 3 panels, horizontal seams | 2 1/4 yd | 6.1 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 twin size is yours?
Sizes depend on the mattress and how far you want the quilt to hang. See what size quilt for a twin bed for every drop, or the full quilt size chart. Same quilts: how much binding for a twin quilt, batting and all the fabric.
Questions quilters ask
How much backing do I need for a twin size quilt?
5 1/2 to 6 3/4 yd of 42-44 inch quilting cotton, depending on the size. A 70 x 90 inch twin quilt needs 5 1/2 yd (2 panels, vertical seam), allowing 4 inches extra on every side for quilting.
How much 108 inch wide backing for a twin quilt?
2 1/8 to 2 1/4 yd. Every common twin size fits on one width of 108 inch backing, so there are no seams.
Which way should the seams run on a twin quilt backing?
For 70 x 90, vertical seams take 5 1/2 yd and horizontal seams take 6 1/2 yd. Work out both: the cheaper direction depends on the quilt's width and length.
Try your own numbers
Updated 2026-11-14. How we calculate.
Every quilt calculator in your pocket: borders, setting triangles, HSTs, saved projects and a fabric shopping list.