Yorkshire Woollen Count to English Cotton Count (NY to Ne)

Formula

Ne = NY × 0.3047619047619

or Ne = NY ÷ 3.28125

Derivation from SI units:

• Yorkshire woollen count = number of 256-yard skeins per pound, so tex = 1937.7 ÷ count
• Ne = number of 840-yard hanks per pound, so tex = 0.45359237 kg ÷ (840 × 0.9144 m) × 10⁶ ÷ Ne = 590.5412 ÷ Ne
• 1 NY = 0.00193771346819 kg/m ÷ 0.0005905412474482 kg/m per Ne = 0.3047619047619 Ne

Both units are defined exactly, so the factor is exact. Yorkshire Woollen Count definition: Yorkshire woollen count; English Cotton Count definition: English cotton count.

Worked examples

1. A reading of 10 NY converts to 3.047619048 Ne.
   10 NY × 0.3047619048 = 3.047619048 Ne
2. A value of 20 NY is 6.095238095 Ne.
   20 NY × 0.3047619048 = 6.095238095 Ne

Where it's used

Yorkshire Woollen Count are used for woollen-spun yarns for tweeds and blankets, while English cotton count appear in cotton and blended spun yarns (20s, 30s, 40s). Both measure yarn count (linear density of yarns and fibres), so the conversion is a fixed factor.

Yorkshire Woollen Count to other yarn count units

Frequently asked questions

Sources

• ASTM D2260, Standard Tables of Conversion Factors and Equivalent Yarn Numbers Measured in Various Numbering Systems, ASTM International , Woollen count (Yorkshire skeins).
• Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "yard" and "pound".
• ASTM D2260, Standard Tables of Conversion Factors and Equivalent Yarn Numbers Measured in Various Numbering Systems, ASTM International , Cotton count (Ne).

Last reviewed: 2026-10-15. Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.