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How much backing fabric for a 60 × 70 quilt?
Throw size quilt, finished 60″ × 70″ (152.4 cm × 177.8 cm).
Buy
3 7/8 yd
of standard 42″–44″ quilting cotton — 2 panels × 68″ with 1 horizontal seam. Or 2 yd of 108″ wide backing (one piece, no seams — cut 68″). Metric: 3.5 m of 110 cm fabric.
How it's worked out
- Add 4″ on every side for quilting (long-arm quilters usually ask for 4″–5″): 60 + 8 = 68″ wide, 70 + 8 = 78″ long.
- Quilting cotton is 42″–44″ wide; after trimming selvages about 40″ is usable, and each seam takes 1″.
- Running the seams horizontally you need 2 widths of fabric, each 68″ long.
- 2 × 68″ = 136″ = 3.78 yards → round up to the next ⅛ yard: 3 7/8 yd.
Sewing the seams the other way (vertical) would take 2 panels × 78″ with 1 vertical seam = 4 3/8 yd , so horizontal seams save fabric.
Backing yardage with different overhang
| Extra per side | Backing size | 42″ fabric | 108″ wide | Metric |
|---|---|---|---|---|
| 2″ | 64″ × 74″ | 3 5/8 yd (2 panels) | 1 7/8 yd | 3.3 m |
| 3″ | 66″ × 76″ | 3 3/4 yd (2 panels) | 1 7/8 yd | 3.4 m |
| 4″ | 68″ × 78″ | 3 7/8 yd (2 panels) | 2 yd | 3.5 m |
| 5″ | 70″ × 80″ | 4 1/2 yd (2 panels) | 2 yd | 4.1 m |
| 6″ | 72″ × 82″ | 4 5/8 yd (2 panels) | 2 yd | 4.2 m |
Same quilt: binding & batting
- Binding for a 60 × 70 quilt: 8 strips of 2½″ → 5/8 yd.
- Batting: at least 68″ × 78″ — a Twin package fits, or 2 yd off a 96″ roll.
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