Convert Worsted Count to Tex (Nw to tex)
Worsted Count and tex are inversely related: tex = 885.8118712 ÷ Nw, so 15 Nw = 59.05412474 tex.
Also searched as worsted count to tex, worsted count in tex, worsted count into tex, Nw to tex, Nw in tex, Nw into tex and Nw to tex converter.
1 Nw = 885.8118712 tex
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk Nw to tex converter to paste a column from Excel.
How to Convert Worsted Count to Tex
- tex = 885.8118712 ÷ Nw
- Nw = 885.8118712 ÷ tex
- Example: convert 15 Nw to tex: 885.8118712 ÷ 15 = 59.05412474 tex
Formula
tex = 885.8118711724 ÷ Nw
Derivation from SI units:
- Nw = number of 560-yard hanks per pound, so tex = 885.8119 ÷ Nw
- 1 tex = 1 g per 1000 m = 10⁻⁶ kg/m (exact)
- Solving for tex: tex = 885.8118711724 ÷ Nw (a higher Nw means a lower tex)
Both units are defined exactly, so the factor is exact. Worsted Count definition: worsted count; Tex definition: tex.
Worked examples
- A reading of 24 Nw converts to 36.90882797 tex.
885.8118712 ÷ 24 = 36.90882797 tex - A value of 48 Nw is 18.45441398 tex.
885.8118712 ÷ 48 = 18.45441398 tex
Worsted Count to Tex conversion table
| Worsted Count (Nw) | Tex |
|---|---|
| 8 Nw | 110.7264839 tex |
| 12 Nw | 73.81765593 tex |
| 16 Nw | 55.36324195 tex |
| 20 Nw | 44.29059356 tex |
| 24 Nw | 36.90882797 tex |
| 30 Nw | 29.52706237 tex |
| 36 Nw | 24.60588531 tex |
| 40 Nw | 22.14529678 tex |
| 48 Nw | 18.45441398 tex |
| 60 Nw | 14.76353119 tex |
| 64 Nw | 13.84081049 tex |
| 80 Nw | 11.07264839 tex |
Where it's used
Worsted Count are used for worsted wool and acrylic yarns, while tex appear in yarn specifications in metric countries. Both measure yarn count (linear density of yarns and fibres), but one system is the inverse of the other, so a fixed constant is divided by the value.
Worsted Count to other yarn count units
| Conversion | 1 Nw equals |
|---|---|
| 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 woollen count | 2.1875 NY |
| Nw to linen lea | 1.866666667 NeL |
Show 1 more units
| Nw to kilogram per metre | 0.0008858118712 kg/m |
|---|
Frequently asked questions
What is the formula for worsted count to tex?
tex = 885.8118712 ÷ Nw. The two systems are inversely related, so divide the constant by the value; do not multiply. For example, 885.8118712 ÷ 15 = 59.05412474 tex.
Why does a higher Nw give a lower tex?
Worsted Count counts length per unit mass (an indirect system), while tex counts mass per unit length (a direct system). A finer yarn has a higher indirect number and a lower direct number.
Is the Nw to tex conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
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".
- ISO 1144, Textiles — Universal system for designating linear density (Tex System), International Organization for Standardization , Tex system.
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 Tex (Nw to tex). Retrieved October 25, 2026, from https://scientificconverters.com/yarn-count/worsted-count-to-tex/
IEEE
Scientific Converters, "Convert Worsted Count to Tex (Nw to tex)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/yarn-count/worsted-count-to-tex/