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How much binding for a 80 × 90 quilt?
Full size quilt, finished 80″ × 90″.
Buy
3/4 yd
Cut 10 strips 2½″ wide across the width of fabric for 352″ of double-fold binding. Metric: 0.7 m.
How it's worked out
- Perimeter: (80 + 90) × 2 = 340″.
- Add about 12″ to join the ends and turn the corners: 352″.
- Each strip across 42″–44″ fabric gives about 40″ usable, minus ~2½″ for each diagonal join → 37½″ per strip.
- 352 ÷ 37½ = 9.39 → 10 strips. 10 × 2½″ = 25″ → round up to 3/4 yd.
Binding by strip width
| Strip width | Strips | Buy | Metric | Bias (continuous) |
|---|---|---|---|---|
| 2″ | 10 | 5/8 yd | 0.6 m | 28 5/8″ square (7/8 yd) |
| 2 1/4″ | 10 | 5/8 yd | 0.6 m | 30 1/2″ square (7/8 yd) |
| 2 1/2″ | 10 | 3/4 yd | 0.7 m | 32 1/4″ square (1 yd) |
| 3″ | 10 | 7/8 yd | 0.8 m | 35 1/2″ square (1 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 80 × 90 quilt: 7 3/8 yd of 42″ fabric (3 panels with 2 horizontal seams).
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