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How much binding for a 100 × 100 quilt?
King size quilt, finished 100″ × 100″.
Buy
7/8 yd
Cut 11 strips 2½″ wide across the width of fabric for 412″ of double-fold binding. Metric: 0.7 m.
How it's worked out
- Perimeter: (100 + 100) × 2 = 400″.
- Add about 12″ to join the ends and turn the corners: 412″.
- Each strip across 42″–44″ fabric gives about 40″ usable, minus ~2½″ for each diagonal join → 37½″ per strip.
- 412 ÷ 37½ = 10.99 → 11 strips. 11 × 2½″ = 27 1/2″ → round up to 7/8 yd.
Binding by strip width
| Strip width | Strips | Buy | Metric | Bias (continuous) |
|---|---|---|---|---|
| 2″ | 11 | 5/8 yd | 0.6 m | 30 3/4″ square (7/8 yd) |
| 2 1/4″ | 11 | 3/4 yd | 0.7 m | 32 3/4″ square (1 yd) |
| 2 1/2″ | 11 | 7/8 yd | 0.7 m | 34 5/8″ square (1 yd) |
| 3″ | 12 | 1 yd | 1.0 m | 38 1/4″ square (1 1/8 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 100 × 100 quilt: 9 yd of 42″ fabric (3 panels with 2 vertical seams).
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