Quilting
Quilt Size Calculator
Plan a quilt layout: how many blocks fit your target size with sashing and borders, the actual finished size, and the sashing pieces to cut.
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Calculator
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How many blocks do I need for a 60" × 80" quilt?
For a 60" × 80" quilt made of 10" blocks with 2" sashing and a 3" border:
You enter
- Desired size
- 60" × 80" (152.40 cm × 203.20 cm)
- Finished block
- 10" (25.40 cm)
- Sashing / border
- 2" / 3" (5.08 cm / 7.62 cm)
You get
- Blocks
- 30 blocks (5 across × 6 down)
- Actual quilt size
- 64" × 76" (162.6 cm × 193.0 cm)
- Sashing strips
- 25 horizontal + 24 vertical
- Cornerstones
- 20
The formula: blocks across = round((width − 2 × border) ÷ (block + sashing)); the same for blocks down.
How many blocks do I need for standard quilt sizes?
Typical finished sizes with 10" and 12" blocks and no sashing or border, worked out by the calculator above. Measure your bed if you want a specific drop.
| Quilt | Block | Blocks | Actual size |
|---|---|---|---|
| Crib, 36" × 52" (91 × 132 cm) | 10" (25.40 cm) | 20 (4 × 5) | 40" × 50" (101.6 cm × 127.0 cm) |
| Crib, 36" × 52" (91 × 132 cm) | 12" (30.48 cm) | 12 (3 × 4) | 36" × 48" (91.4 cm × 121.9 cm) |
| Throw, 50" × 65" (127 × 165 cm) | 10" (25.40 cm) | 35 (5 × 7) | 50" × 70" (127.0 cm × 177.8 cm) |
| Throw, 50" × 65" (127 × 165 cm) | 12" (30.48 cm) | 20 (4 × 5) | 48" × 60" (121.9 cm × 152.4 cm) |
| Twin, 68" × 86" (173 × 218 cm) | 10" (25.40 cm) | 63 (7 × 9) | 70" × 90" (177.8 cm × 228.6 cm) |
| Twin, 68" × 86" (173 × 218 cm) | 12" (30.48 cm) | 42 (6 × 7) | 72" × 84" (182.9 cm × 213.4 cm) |
| Full / Double, 81" × 96" (206 × 244 cm) | 10" (25.40 cm) | 80 (8 × 10) | 80" × 100" (203.2 cm × 254.0 cm) |
| Full / Double, 81" × 96" (206 × 244 cm) | 12" (30.48 cm) | 56 (7 × 8) | 84" × 96" (213.4 cm × 243.8 cm) |
| Queen, 90" × 108" (229 × 274 cm) | 10" (25.40 cm) | 99 (9 × 11) | 90" × 110" (228.6 cm × 279.4 cm) |
| Queen, 90" × 108" (229 × 274 cm) | 12" (30.48 cm) | 72 (8 × 9) | 96" × 108" (243.8 cm × 274.3 cm) |
| King, 108" × 108" (274 × 274 cm) | 10" (25.40 cm) | 121 (11 × 11) | 110" × 110" (279.4 cm × 279.4 cm) |
| King, 108" × 108" (274 × 274 cm) | 12" (30.48 cm) | 81 (9 × 9) | 108" × 108" (274.3 cm × 274.3 cm) |
Frequently asked questions
How many quilt blocks do I need?
Divide the quilt's width and height (minus borders) by the block size plus any sashing, and round to whole blocks — then multiply across by down. For a 60" × 80" quilt with 10" blocks, 2" sashing, and 3" borders, that's 5 across × 6 down = 30 blocks.
What are standard quilt sizes?
Common finished sizes are crib 36" × 52", throw 50" × 65", twin 68" × 86", full/double 81" × 96", queen 90" × 108", and king 108" × 108". Sizes vary by maker and by how far you want the quilt to drape over the bed.
Why is my actual quilt size different from my target?
Blocks only come in whole numbers, so the layout rarely hits your target exactly. When the difference is more than 2", adjust the block size, add or widen borders, or change the sashing width to get closer.
How many sashing strips and cornerstones do I need?
Between blocks you need (blocks across × (rows − 1)) horizontal strips and (rows × (blocks across − 1)) vertical strips, each the block size long, plus one cornerstone where every pair of strips crosses. The calculator lists all three counts.
Related tools
Which quilting machine should I use for this project?
Three picks from starter to step-up, sold in Canada and the US. Want a match for your budget? Take the machine picker.
The first quilter
Baby Lock Jubilant
CA$899 · US$699
80 built-in stitches · Computerized · 1-step buttonhole
See it at your shop →
Quilt and embroider
Janome MC9850
CA$2,299 · US$1,499
6.7" x 7.9" embroidery field · 200 built-in stitches · 175 built-in designs
See it at your shop →
The forever upgrade
Janome Skyline S9
CA$3,999 · US$3,999
8.3" throat space · 250 built-in stitches · AcuFeed Flex dual feed
See it at your shop →
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