Free Quilt Calculator

Eight essential calculators — fabric, binding, backing, borders & more

Quilt Sashing Calculator

Calculate the exact fabric yardage needed for quilt sashing. Enter your block size, number of rows and columns, and sashing width to get separate yardage figures for vertical sashing, horizontal sashing, and optional cornerstones.

Sashing

Calculates sashing fabric with optional cornerstones, all around the blocks. Enter finished sizes — cut sizes (with ¼" seam allowance) are calculated automatically.

All calculations show the exact fabric needed based on your inputs — they do not include extra for cutting errors. Consider adding 5–10% to any yardage figure. Standard quilting cotton WOF is 44".

How It Works

  1. Add ¼\" seam allowance to each dimension to get cut sizes for the sashing strips and cornerstones.
  2. Count vertical sashing pieces (rows × (columns + 1)) and calculate how many fit per WOF strip, then find total yardage.
  3. For horizontal sashing without cornerstones, calculate full-width bands spanning all blocks and sashing. With cornerstones, calculate horizontal sashing pieces separately.
  4. If cornerstones are enabled, count them ((rows + 1) × (columns + 1)) and calculate their yardage as separate small squares.

Frequently Asked Questions

What is the difference between sashing and cornerstones?
Sashing strips are the rectangles of fabric placed between quilt blocks to separate and frame them. Cornerstones are small squares placed at the intersections where sashing strips meet, adding a design accent and visually breaking the sashing into segments.
Should I enter finished or cut sizes?
Enter finished sizes — the measurements the block and sashing will be in the completed quilt, not accounting for seams. The calculator automatically adds ¼" seam allowance to each dimension to get the cut size.
How much sashing should I add between blocks?
Common sashing widths range from 1.5" to 3" finished. Wider sashing (2.5–3") gives the quilt a more open, airy feel. Narrower sashing (1–1.5") keeps the design more compact. The sashing width is often related to the border width for visual consistency.
Can sashing and cornerstones be different fabrics?
Yes. The calculator gives you separate yardage figures for vertical sashing, horizontal sashing, and cornerstones so you can purchase each fabric independently.

Related Calculators

Strips CalculatorBorder CalculatorYardage CalculatorShapes & HST Calculator