Yarn Count

Yarn Count Ne

Weave Repeat Threads and intersections

Threads per Repeat (F) no.

Plain 2, 2/2 and 3/1 twill 4, 5-end satin 5

Intersections per Repeat (I) no.

Plain 2, most twills 2, satin 2

Actual Fabric For comparison

Actual Sett /inch

Maximum Sett

— /inch

Theoretical jammed limit for this weave and count

Geometry

Threads Touching per Inch: — /inch
Yarn Diameter: — mm
Sett as Share of Maximum: — %
Headroom to Jamming: — /inch

Ashenhurst assumes circular, incompressible yarn. Real fabrics regularly exceed the calculated maximum because beat-up flattens the yarn, so treat this as a design guide rather than a hard ceiling.

Maximum Sett Predictor (Ashenhurst's Rule) — free, with the formula and a worked example, at Textile School.