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Quilt Math Guide

Sewing and quilt math

Put fabric math and a tested sample before the full cut.

Plan yardage, backing, binding, blocks, and finishing with visible formulas, original diagrams, and material-aware checkpoints.

Interactive planning

Free tools that show the method

Enter your own numbers, see the estimate, then read the assumptions before acting.

Editorial guides

Latest practical articles

Each article includes a concrete workflow, a worked example, a checklist, limitations, and source links.

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Project Planning, Care & Inspiration

How to Build a Quilt Project Plan From Sketch to Finish

A practical project planning, care & inspiration guide to build a quilt project plan from sketch to finish, with a repeatable method, worked example, checklist, limitations, and official source links.

Updated August 8, 20264 min read

Project Planning, Care & Inspiration

How to Calculate Quilt Size for Common Mattress Dimensions

A practical project planning, care & inspiration guide to calculate quilt size for common mattress dimensions, with a repeatable method, worked example, checklist, limitations, and official source links.

Updated August 8, 20264 min read

Quilting, Binding & Finishing

How to Make a Quilt Sandwich: Backing, Batting, and Top

A practical quilting, binding & finishing guide to make a quilt sandwich — backing, batting, and top, with a repeatable method, worked example, checklist, limitations, and official source links.

Updated August 8, 20264 min read

Quilting, Binding & Finishing

Cotton, Polyester, and Blend Batting Compared

A practical quilting, binding & finishing guide to cotton, polyester, and blend batting compared, with a repeatable method, worked example, checklist, limitations, and official source links.

Updated August 8, 20264 min read

Piecing & Quilt Blocks

How to Sew an Accurate Quarter-Inch Quilt Seam

A practical piecing & quilt blocks guide to sew an accurate quarter-inch quilt seam, with a repeatable method, worked example, checklist, limitations, and official source links.

Updated August 8, 20264 min read

Piecing & Quilt Blocks

Half-Square Triangles: Two-at-a-Time Method for Beginners

A practical piecing & quilt blocks guide to half-square triangles — two-at-a-time method for beginners, with a repeatable method, worked example, checklist, limitations, and official source links.

Updated August 8, 20264 min read

Measuring, Cutting & Fabric Planning

How to Estimate Yardage for a Simple Rectangular Project

A practical measuring, cutting & fabric planning guide to estimate yardage for a simple rectangular project, with a repeatable method, worked example, checklist, limitations, and official source links.

Updated August 8, 20264 min read

Measuring, Cutting & Fabric Planning

Fabric Width Explained: How Usable Width Affects Yardage

A practical measuring, cutting & fabric planning guide to fabric width understood — how usable width affects yardage, with a repeatable method, worked example, checklist, limitations, and official source links.

Updated August 8, 20264 min read

Sewing Foundations & Machine Setup

How to Thread a Sewing Machine Using the Manual’s Thread Path

A practical sewing foundations & machine setup guide to thread a sewing machine using the manual's thread path, with a repeatable method, worked example, checklist, limitations, and official source links.

Updated August 8, 20264 min read

How we work

Useful before optimized

We expose every measurement assumption, distinguish usable fabric width from nominal width, recommend a test block, and respect pattern and design rights.

See sources and methodology

Important limitations

Tools provide planning estimates, not professional, medical, legal, safety, carrier, park, or manufacturer determinations. Always verify time-sensitive details with the linked official source.