Quilt Square Planner
Plan square patch count and cutting size including seam allowance.
Your inputs
Calculation results
Formula & assumptions
Rows and columns round up; cut side = finished side + two seam allowances.
Values use the specified units. Calculations use floating-point arithmetic. Check input measurements and formula assumptions before applying the result.
Compare your scenarios
Save up to five results to compare changes side by side. Scenarios stay in this tab until you clear or reload it.
Using Quilt Square Planner
Plan square patch count and cutting size including seam allowance.
- Enter finished quilt width, finished quilt height, finished square side, seam allowance per edge using the units printed under each field.
- Choose Calculate, or enable live updates. Review the result labels and formula assumptions.
- Save scenarios to compare up to five variations, then copy the report or download JSON or CSV.
Example
Finished quilt width: 150 centimeters Finished quilt height: 200 centimeters Finished square side: 10 centimeters Seam allowance per edge: 0.6 centimeters Columns: 15 Rows: 20 Squares: 300 Cut side · centimeters: 11.2 Actual finished width · centimeters: 150 Actual finished height · centimeters: 200
Questions & answers
What does Quilt Square Planner calculate?
Plan square patch count and cutting size including seam allowance.
Which units should I enter?
Finished quilt width uses centimeters. Finished quilt height uses centimeters. Finished square side uses centimeters. Seam allowance per edge uses centimeters. Convert values to these units before calculating.
Which formula does it use?
Rows and columns round up; cut side = finished side + two seam allowances.
What does the included example show?
Finished quilt width: 150 centimeters; Finished quilt height: 200 centimeters; Finished square side: 10 centimeters; Seam allowance per edge: 0.6 centimeters. Result: Columns = 15; Rows = 20; Squares = 300; Cut side · centimeters = 11.2; Actual finished width · centimeters = 150; Actual finished height · centimeters = 200.
Can I compare different settings?
Yes. Save a scenario, change the inputs and save another result. Up to five scenarios are compared in this tab; they disappear when you reload or leave.
Can I export the calculation?
Copy the JSON report or download JSON and CSV with inputs, result labels and numeric values. Processing uses local JavaScript; no calculation request is sent to our server. Displayed values use up to 10 significant digits; exports retain JavaScript numeric precision.
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