Chart conditions
- Measured quilt top
- Width × length in inches; these rectangles are illustrative measurements, not named bed-size standards.
- Overhang and seams
- 4 in per side; 1/2 in seam allowance at each joined edge. These are this chart’s chosen conditions. Other longarm requirements may differ; confirm your quilter’s requirements.
- Panel direction
- Fixed vertical panels: usable fabric width runs across top width, and each panel length is top length plus 8 in. No rotation or print-repeat matching. Choose an orientation that suits the print.
- Purchase example
- Round the exact theoretical amount up to 1/4 yd. No prewash or cutting reserve. This chosen increment does not establish a retailer’s selling increment.
Choose a table by measured usable width after unusable edges are removed. A bolt labeled 108 in does not establish 108 in usable width. For a different width or any other condition, use the calculator.
40 in usable width
| Quilt top | Panels × cut length | Theory, approx. | Purchase example |
|---|---|---|---|
| 36 × 48 in | 2 × 56 in | 3.111 yd | 3.25 yd |
| 48 × 60 in | 2 × 68 in | 3.778 yd | 4 yd |
| 60 × 80 in | 2 × 88 in | 4.889 yd | 5 yd |
| 72 × 90 in | 3 × 98 in | 8.167 yd | 8.25 yd |
| 84 × 92 in | 3 × 100 in | 8.333 yd | 8.5 yd |
| 100 × 100 in | 3 × 108 in | 9 yd | 9 yd |
42 in usable width
| Quilt top | Panels × cut length | Theory, approx. | Purchase example |
|---|---|---|---|
| 36 × 48 in | 2 × 56 in | 3.111 yd | 3.25 yd |
| 48 × 60 in | 2 × 68 in | 3.778 yd | 4 yd |
| 60 × 80 in | 2 × 88 in | 4.889 yd | 5 yd |
| 72 × 90 in | 2 × 98 in | 5.444 yd | 5.5 yd |
| 84 × 92 in | 3 × 100 in | 8.333 yd | 8.5 yd |
| 100 × 100 in | 3 × 108 in | 9 yd | 9 yd |
108 in usable width
| Quilt top | Panels × cut length | Theory, approx. | Purchase example |
|---|---|---|---|
| 36 × 48 in | 1 × 56 in | 1.556 yd | 1.75 yd |
| 48 × 60 in | 1 × 68 in | 1.889 yd | 2 yd |
| 60 × 80 in | 1 × 88 in | 2.444 yd | 2.5 yd |
| 72 × 90 in | 1 × 98 in | 2.722 yd | 2.75 yd |
| 84 × 92 in | 1 × 100 in | 2.778 yd | 3 yd |
| 100 × 100 in | 1 × 108 in | 3 yd | 3 yd |
Read the result
These lookup examples use the same rectangular-panel model as the backing calculator. Select the smallest whole panel count whose assembled width covers top width plus 8 in: n × usable width − 2 × seam allowance × (n − 1). Theory is n × panel cut length ÷ 36. Purchase rounding uses the unrounded value.
Theory is displayed to three decimal places for lookup, not as a cutting or buying instruction. Check panel lengths, measured usable width, directional print and the actual assembled backing before use. This chart does not establish suitability for every project.