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How much binding for a 120 × 120 quilt?
King size quilt, finished 120″ × 120″.
Buy
1 yd
Cut 14 strips 2½″ wide across the width of fabric for 492″ of double-fold binding. Metric: 0.9 m.
How it's worked out
- Perimeter: (120 + 120) × 2 = 480″.
- Add about 12″ to join the ends and turn the corners: 492″.
- Each strip across 42″–44″ fabric gives about 40″ usable, minus ~2½″ for each diagonal join → 37½″ per strip.
- 492 ÷ 37½ = 13.12 → 14 strips. 14 × 2½″ = 35″ → round up to 1 yd.
Binding by strip width
| Strip width | Strips | Buy | Metric | Bias (continuous) |
|---|---|---|---|---|
| 2″ | 13 | 3/4 yd | 0.7 m | 33 3/8″ square (1 yd) |
| 2 1/4″ | 14 | 7/8 yd | 0.9 m | 35 5/8″ square (1 yd) |
| 2 1/2″ | 14 | 1 yd | 0.9 m | 37 5/8″ square (1 1/8 yd) |
| 3″ | 14 | 1 1/4 yd | 1.1 m | 41 1/2″ square (1 1/4 yd) |
Bias binding is only needed for curved or scalloped edges; straight-grain strips are fine for square corners.
Same quilt: backing
Backing for a 120 × 120 quilt: 14 1/4 yd of 42″ fabric (4 panels with 3 vertical seams).
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