Does this include seam allowance?
Use finished block size, not unfinished cut size. Seam allowance is already inside your block construction.
Free quilting calculator
Quilt Block Calculator
Estimate how many finished blocks fit across and down your quilt center. This is a planning tool for simple grid layouts.
Result
Block count estimate
Plan for 5 blocks across × 6 blocks down.
- Center size
- 60" × 72"
- Blocks across
- 5
- Blocks down
- 6
- Total blocks
- 30
If your layout uses partial blocks, borders, or complex sashing, sketch the final layout before cutting.
Formula
Center size = quilt size minus borders. Block unit = block size + sashing. Block count = blocks across × blocks down.
Example calculation
A 60" × 72" quilt with 12" blocks usually needs 5 blocks across and 6 blocks down before borders or sashing changes.
Results are planning estimates. Always round up when buying fabric, especially for directional prints, shrinkage, fussy cutting, or cutting mistakes.
Related calculators
Fabric Yardage CalculatorEstimate fabric yardage from piece size, fabric width, quantity, seam allowance, and project type.Quilt Border CalculatorEstimate quilt border strips and fabric yardage using quilt size, border width, and fabric width.Quilt Size CalculatorChoose a quilt type or enter custom dimensions to estimate finished quilt size, backing, batting, and binding needs.
Frequently asked questions
What if the blocks do not divide evenly?
The calculator rounds up, then you can adjust borders, sashing, or block size.
Does this work for diagonal settings?
It is intended for straight grid layouts. Diagonal settings need extra planning.
Can I include borders?
Yes. Enter the border width so the calculator estimates the block center area.