Free calculators

Quilting calculators, on the house

The same math that powers the app, free in your browser. No sign-up, and it works on your phone at the fabric store. For your stash, projects, and the full block library, get the app.

Whole quilt

Quilt Yardage

Backing, batting, and binding from one size.

Quilt Backing

Yardage with the fewest seams.

Quilt Batting

Batting size, and the cut off a roll.

Quilt Binding

Straight-grain strips and total yardage.

Quilt Borders

Strip lengths and yardage, butted or mitered.

Quilt Size

Block grid to finished top size.

Blocks & units

Half-Square Triangle

Cut size for 2, 4, or 8 at a time.

Quarter-Square Triangle

Hourglass units, both ways of making them.

Flying Geese

No-waste and traditional methods.

Square in a Square

Economy block, with the correct math.

Setting Triangles

On-point side and corner triangles.

Fabric & cutting

Fabric Yardage

How much fabric for a set of pieces.

Pieces From Fabric

What your yardage actually yields.

Precuts

Fat quarters, jelly rolls, charm packs.

Prefer to look a size up rather than type it in? The printable cutting chartscover the common sizes, and the quilt-math cheat sheet puts the formulas on a single page for the sewing-room wall.