Home › Binding calculator › 70 × 90
How much binding for a 70 × 90 quilt?
Twin size quilt, finished 70″ × 90″.
Buy
5/8 yd
Cut 9 strips 2½″ wide across the width of fabric for 332″ of double-fold binding. Metric: 0.6 m.
How it's worked out
- Perimeter: (70 + 90) × 2 = 320″.
- Add about 12″ to join the ends and turn the corners: 332″.
- Each strip across 42″–44″ fabric gives about 40″ usable, minus ~2½″ for each diagonal join → 37½″ per strip.
- 332 ÷ 37½ = 8.85 → 9 strips. 9 × 2½″ = 22 1/2″ → round up to 5/8 yd.
Binding by strip width
| Strip width | Strips | Buy | Metric | Bias (continuous) |
|---|---|---|---|---|
| 2″ | 9 | 1/2 yd | 0.5 m | 27 7/8″ square (7/8 yd) |
| 2 1/4″ | 9 | 5/8 yd | 0.6 m | 29 5/8″ square (7/8 yd) |
| 2 1/2″ | 9 | 5/8 yd | 0.6 m | 31 3/8″ square (7/8 yd) |
| 3″ | 9 | 3/4 yd | 0.7 m | 34 5/8″ 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 70 × 90 quilt: 5 1/2 yd of 42″ fabric (2 panels with 1 vertical seam).
Try your own numbers
Quiltwell for iPhone, iPad & Android
Every quilt calculator in your pocket: borders, setting triangles, HSTs, saved projects and a fabric shopping list.
Every quilt calculator in your pocket: borders, setting triangles, HSTs, saved projects and a fabric shopping list.