QUILTMATH
Free preview

Your quilt pattern, sized to your bed and your fabric.

Pick a classic block, your quilt size and the fabric you have (yardage, fat quarters, a jelly roll, a charm pack or a layer cake). QuiltMath works out the blocks, the cutting chart and the yardage, so you cut once and cut right.

Make my patternLayout and yardage free · $19.99 for the full pattern

Log cabin quilt layout, queen size: 49 blocks of 12 inches in light-and-dark diamonds with a 4-inch border
Log cabin quilt pattern, queen, 12" blocks from yardage.
Log cabinqueen · yardage
BLOCKS
49 x 12", light-and-dark diamonds
FINISHED
92" x 92" (asked 90" x 95")
FABRIC
3 lights, 3 darks, centers, 4" border
BACKING
8 3/8 yd, binding 7/8 yd
01 / 03

Real layouts from QuiltMath at queen size. Colors stand in for your fabrics.

How it works

Cut once, cut right.

  1. 01

    Choose your block, size and fabric

    Log cabin, half-square triangles, rail fence, 4-patch or churn dash. Crib to king or your own width and length. Yardage, fat quarters, jelly roll strips, charm squares or layer cake squares, border width, backing and binding.

  2. 02

    See it free

    The quilt layout, its true finished size (and how far it is from what you asked for), and the yardage or precut count for every fabric.

  3. 03

    Unlock the pattern

    Pay $19.99 once and get the full cutting chart, block diagram and assembly steps on the page, by email and as a PDF.

What you get

Every number you need to cut and sew.

The pattern is calculated, not guessed: 1/4" seams, 42" of usable fabric width and 10% extra yardage. The same inputs always give the same pattern.

  1. 01

    Quilt layout

    Drawn to scale, with your border and binding.

  2. 02

    Materials list

    Yardage for every fabric, rounded up to the next 1/8 yard with 10% extra; or the exact number of charm squares, layer cake squares, jelly roll strips or fat quarters, and how many packs that is.

  3. 03

    Cutting chart per fabric

    Strip width, number of strips, every piece with its cut size and count, and how to subcut each strip so nothing is wasted.

  4. 04

    Block diagram with measurements

    Every piece labelled with its letter or log number.

  5. 05

    Assembly order

    Block by block, then rows, borders, backing, batting and binding.

  6. 06

    Backing, binding and batting

    Pieced backing panels, binding strips and length, batting size and the packaged size that fits.

Order

Start with a free preview

One quilt pattern

$19.99

  • Free layout and yardage first
  • Cutting chart for every fabric
  • Block diagram + assembly steps
  • Printable US Letter PDF
  • Math error fixed or refunded
Backing, binding and batting

The layout and yardage are free. You pay only for the full pattern.

Questions

Which quilt blocks can I choose?

Log cabin: a center square plus rounds of logs, light on two sides and dark on two, set in light-and-dark diamonds; blocks from 6" to 16", with 2 1/2" logs from a jelly roll. Half-square triangles: made two at a time from squares cut finished size + 7/8", set in zigzag bands; charm packs and layer cakes work, jelly rolls use 2" stitch-and-flip units. Rail fence: two to five rails per block, strip-pieced when that saves fabric, set in the classic zigzag. 4-patch: two print and two background squares per block; whole 5" charm squares make 9" blocks. Churn dash: corner half-square triangles, side bars and a center square on a 3 x 3 grid; one layer cake square gives the prints for one 12" block.

What seam allowance do you use?

A 1/4" seam allowance throughout. Every cut size in the pattern already includes it, so cut exactly what the chart says.

How wide is "width of fabric"?

We count 42" of usable width (WOF) after the selvages are trimmed, which is what most quilt patterns assume. Backing panels are counted at 40" usable, to leave room for the seams. Fat quarters are counted as 18" x 21", jelly roll strips as 2 1/2" x 42".

How do you round yardage?

We add up the strips each fabric needs, add 10% for straightening, shrinkage and one mistake, then round up to the next 1/8 yard. Precut counts are exact, and we tell you how many packs that is and how many pieces will be left over.

My quilt came out a little bigger or smaller than I asked. Why?

A quilt has to be a whole number of blocks. We pick the count closest to your size and show the true finished size, and the difference, in the free preview, so you can change the block size or border before you buy.

Can I use precuts?

Yes: fat quarters, jelly rolls (2 1/2" strips), charm packs (5" squares) and layer cakes (10" squares). If your block size is too big for your precut, the free preview switches to the nearest size that fits and tells you. Log cabin logs are too long for charm squares, so a charm-pack log cabin is worked out in yardage instead. Background, border, backing and binding are always yardage.

Should I cut everything at once?

Cut and sew one block first and measure it. The pattern tells you the size it should be. If it is off, adjust your seam before cutting the rest.

What if there is a mistake in the math?

The pattern is calculated, not guessed, so the same inputs always give the same pattern. If you find a math error, email us within 14 days of purchase: we fix it and re-send your pattern, or refund you in full.

Do I get a PDF?

Yes. A printable US Letter PDF with the layout, materials, cutting chart, block diagram and assembly steps. It is also on your order page and in your email.

Do I pay before the preview?

No. The layout, finished size and yardage are free. You pay $19.99 only if you want the cutting chart, block diagram, assembly steps and PDF.