Specialty calculators

Textile crafts

How much fabric, how much yarn, and where the increases go.

Fabric yardage

Fabric length for a set of pieces, with seams and shrinkage.

Quilt binding and backing

Binding strips, backing size and the yardage both take.

Half-square triangles

Cutting size and square count for half-square triangles.

Knitting gauge and resizing

Adjusted stitch and row counts for your gauge, and the error if you ignore it.

Yarn substitution

Skeins of a substitute yarn, and how its yardage compares.

Increase and decrease spacing

Shaping rows and the intervals to work them at, evenly spread.

These are planning figures, not a substitute for a standard, a specification or a professional. Check anything that matters against the source your trade actually works to.