Convert Worsted Count to Yorkshire Woollen Count (Nw to NY)
1 worsted count (Nw) = 2.1875 Yorkshire woollen count (NY). 1 NY = 0.4571428571 Nw. Example: 15 Nw = 15 × 2.1875 = 32.8125 NY.
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1 Nw = 2.1875 NY
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk Nw to woollen count converter to paste a column from Excel.
How to Convert Worsted Count to Yorkshire Woollen Count
- 1 Nw = 2.1875 NY
- 1 NY = 0.4571428571 Nw
- Example: convert 15 Nw to NY: 15 Nw = 15 × 2.1875 NY = 32.8125 NY
Formula
NY = Nw × 2.1875
Derivation from SI units:
- Nw = number of 560-yard hanks per pound, so tex = 885.8119 ÷ Nw
- Yorkshire woollen count = number of 256-yard skeins per pound, so tex = 1937.7 ÷ count
- 1 Nw = 0.0008858118711724 kg/m ÷ 0.00193771346819 kg/m per NY = 2.1875 NY
Both units are defined exactly, so the factor is exact. Worsted Count definition: worsted count; Yorkshire Woollen Count definition: Yorkshire woollen count.
Worked examples
- A reading of 24 Nw converts to 52.5 NY.
24 Nw × 2.1875 = 52.5 NY - A value of 48 Nw is 105 NY.
48 Nw × 2.1875 = 105 NY
Worsted Count to Yorkshire Woollen Count conversion table
| Worsted Count (Nw) | Yorkshire Woollen Count (NY) |
|---|---|
| 8 Nw | 17.5 NY |
| 12 Nw | 26.25 NY |
| 16 Nw | 35 NY |
| 20 Nw | 43.75 NY |
| 24 Nw | 52.5 NY |
| 30 Nw | 65.625 NY |
| 36 Nw | 78.75 NY |
| 40 Nw | 87.5 NY |
| 48 Nw | 105 NY |
| 60 Nw | 131.25 NY |
| 64 Nw | 140 NY |
| 80 Nw | 175 NY |
Where it's used
Worsted Count are used for worsted wool and acrylic yarns, while Yorkshire woollen count appear in woollen-spun yarns for tweeds and blankets. Both measure yarn count (linear density of yarns and fibres), so the conversion is a fixed factor.
Worsted Count to other yarn count units
| Conversion | 1 Nw equals |
|---|---|
| Nw to woollen count | 2.1875 NY |
| Nw to tex | 885.8118712 tex |
| Nw to denier | 7972.306841 den |
| Nw to Ne | 0.6666666667 Ne |
| Nw to decitex | 8858.118712 dtex |
| Nw to Nm | 1.128907878 Nm |
| Nw to kilotex | 0.8858118712 ktex |
| Nw to linen lea | 1.866666667 NeL |
Show 1 more units
| Nw to kilogram per metre | 0.0008858118712 kg/m |
|---|
Frequently asked questions
How many Yorkshire woollen count are in 1 worsted count?
1 Nw = 2.1875 NY.
How do I convert worsted count to Yorkshire woollen count?
Multiply the value in Nw by 2.1875. For example, 15 Nw × 2.1875 = 32.8125 NY.
Is the Nw to NY conversion exact?
Yes. Both units are defined exactly, and 1 Nw is exactly 2.1875 NY.
Sources
- ASTM D2260, Standard Tables of Conversion Factors and Equivalent Yarn Numbers Measured in Various Numbering Systems, ASTM International , Worsted count.
- 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 , Woollen count (Yorkshire skeins).
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Worsted Count to Yorkshire Woollen Count (Nw to NY). Retrieved October 25, 2026, from https://scientificconverters.com/yarn-count/worsted-count-to-woollen-count/
IEEE
Scientific Converters, "Convert Worsted Count to Yorkshire Woollen Count (Nw to NY)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/yarn-count/worsted-count-to-woollen-count/