Yarn workbench

Yarn substitution planner

Turn label quantities into a transparent package estimate, then record the project evidence a number cannot decide. Nothing entered here leaves your browser.

Pattern requirement

Use one length unit throughout. Add reserve only when you have a reason for it.

Published or revised project length

Your reserve

The planner does not invent a reserve percentage. Zero is valid.

Label comparison

Length per 100 g is a label comparison, not a yarn-thickness measurement.

Original length (m)

Original mass (g)

Candidate yarn

Candidate length (m)

Candidate mass (g)

Price per package

Project evidence

Record what the calculation cannot establish.

0 of 5 checks recorded. This count is not an approval score.

Representative specimen madeThe actual stitch, strand count, tool, construction, and maker are represented.Gauge checked after intended treatmentStitches and rows, rounds, motifs, or repeats were measured in the required state.Finished fabric acceptedHand, drape, opacity, structure, elasticity, recovery, and appearance suit this project.Use and care needs checkedFibre, comfort, accessibility, wear, cleaning, color, and repair needs were considered.Supply and lot checkedThe required quantity, color or dye lot, returns, continuity, and contingency are known.

Decision boundary

The package count is a planning number, not a substitution verdict.

A same-category yarn, similar length per 100 g, or matching package count can still make a different gauge and fabric. It can also change care, wear, comfort, color, joins, availability, and total consumption.

Use the source-reviewed yarn substitution record to compare the exact labels, structure, specimen, treatment, finished fabric, quantity basis, and project decision. The record cites the current Craft Yarn Council category, FAQ, WPI, and hook-and-needle guidance plus ASTM and ISO linear-density sources.

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