Convert Tex to Worsted Count (tex to Nw)
Tex and worsted count are inversely related: Nw = 885.8118712 ÷ tex, so 15 tex = 59.05412474 Nw.
Also searched as tex to Nw, tex in Nw, tex into worsted count, tex in worsted count, tex to worsted count and tex to worsted count converter.
1 tex = 885.8118712 Nw
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk tex to Nw converter to paste a column from Excel.
How to Convert Tex to Worsted Count
- Nw = 885.8118712 ÷ tex
- tex = 885.8118712 ÷ Nw
- Example: convert 15 tex to Nw: 885.8118712 ÷ 15 = 59.05412474 Nw
Formula
Nw = 885.8118711724 ÷ tex
Derivation from SI units:
- 1 tex = 1 g per 1000 m = 10⁻⁶ kg/m (exact)
- Nw = number of 560-yard hanks per pound, so tex = 885.8119 ÷ Nw
- Solving for Nw: Nw = 885.8118711724 ÷ tex (a higher tex means a lower Nw)
Both units are defined exactly, so the factor is exact. Tex definition: tex; Worsted Count definition: worsted count.
Worked examples
- A reading of 16.4 tex converts to 54.01291897 Nw.
885.8118712 ÷ 16.4 = 54.01291897 Nw - A value of 37 tex is 23.94086138 Nw.
885.8118712 ÷ 37 = 23.94086138 Nw
Tex to Worsted Count conversion table
| Tex | Worsted Count (Nw) |
|---|---|
| 5 tex | 177.1623742 Nw |
| 7.4 tex | 119.7043069 Nw |
| 10 tex | 88.58118712 Nw |
| 14.76 tex | 60.01435442 Nw |
| 16.4 tex | 54.01291897 Nw |
| 20 tex | 44.29059356 Nw |
| 25 tex | 35.43247485 Nw |
| 29.5 tex | 30.02752106 Nw |
| 37 tex | 23.94086138 Nw |
| 50 tex | 17.71623742 Nw |
| 59 tex | 15.01376053 Nw |
| 100 tex | 8.858118712 Nw |
Where it's used
Tex are used for yarn specifications in metric countries, while worsted count appear in worsted wool and acrylic yarns. 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.
Tex to other yarn count units
| Conversion | 1 tex equals |
|---|---|
| tex to Nw | 885.8118712 Nw |
| tex to denier | 9 den |
| tex to Ne | 590.5412474 Ne |
| tex to decitex | 10 dtex |
| tex to Nm | 1000 Nm |
| tex to kilotex | 0.001 ktex |
| tex to woollen count | 1937.713468 NY |
| tex to linen lea | 1653.515493 NeL |
Show 1 more units
| tex to kilogram per metre | 0.000001 kg/m |
|---|
Frequently asked questions
What is the formula for tex to worsted count?
Nw = 885.8118712 ÷ tex. The two systems are inversely related, so divide the constant by the value; do not multiply. For example, 885.8118712 ÷ 15 = 59.05412474 Nw.
Why does a higher tex give a lower Nw?
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 tex to Nw 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
- ISO 1144, Textiles — Universal system for designating linear density (Tex System), International Organization for Standardization , Tex system.
- 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".
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 Tex to Worsted Count (tex to Nw). Retrieved October 25, 2026, from https://scientificconverters.com/yarn-count/tex-to-worsted-count/
IEEE
Scientific Converters, "Convert Tex to Worsted Count (tex to Nw)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/yarn-count/tex-to-worsted-count/