Transparent methodology

Four tools, four narrow calculations

Raw values, rounding, sources, and construction limits remain visible. No tool rewrites a full pattern or guarantees an outcome.

Yarn calculator from a swatch

M = M_swatch × A_project / A_swatch

L = M × L_label / M_label

Gauge conversion planner

new count = old count × maker density / pattern density

Pattern repeat calculator

working count = repeats × multiple + balance

Yarn substitution calculator

substitute packages = ceil(required total length / candidate package length)

Label length per mass and measured gauge differences are reported as separate evidence. They are not collapsed into a compatibility score.

Unit handling

1 in = 2.54 cm, 1 oz = 28.349523125 g, and 1 yd = 0.9144 m.

Editorial controls

Every batch begins with opportunity signals, hard gates, and differentiated briefs. Claims are tied to source records. Drafts require editorial, SEO, accessibility, and QA review. Pages that differ only by a yarn-weight pair, brand, or minor wording are rejected or consolidated.

Shared limits

Measured inputs must represent the intended fabric.
A weight category is not an interchangeability chart.
Labels describe packaged products, not laboratory measurements of every skein.
Different fabrics and treatments require separate review.
Shaping, fit, drape, and durability are not guaranteed.