Convert Worsted Count to Decitex (Nw to dtex)
Worsted Count and decitex are inversely related: dtex = 8858.118712 ÷ Nw, so 15 Nw = 590.5412474 dtex.
Also searched as worsted count to dtex, worsted count in dtex, worsted count into decitex, Nw to dtex, Nw in decitex, Nw into decitex, worsted count to decitex and Nw to decitex converter.
1 Nw = 8858.118712 dtex
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk Nw to decitex converter to paste a column from Excel.
How to Convert Worsted Count to Decitex
- dtex = 8858.118712 ÷ Nw
- Nw = 8858.118712 ÷ dtex
- Example: convert 15 Nw to dtex: 8858.118712 ÷ 15 = 590.5412474 dtex
Formula
dtex = 8858.118711724 ÷ Nw
Derivation from SI units:
- Nw = number of 560-yard hanks per pound, so tex = 885.8119 ÷ Nw
- 1 dtex = 1 g per 10 000 m = 0.1 tex = 10⁻⁷ kg/m (exact)
- Solving for dtex: dtex = 8858.118711724 ÷ Nw (a higher Nw means a lower dtex)
Both units are defined exactly, so the factor is exact. Worsted Count definition: worsted count; Decitex definition: decitex.
Worked examples
- A reading of 24 Nw converts to 369.0882797 dtex.
8858.118712 ÷ 24 = 369.0882797 dtex - A value of 48 Nw is 184.5441398 dtex.
8858.118712 ÷ 48 = 184.5441398 dtex
Worsted Count to Decitex conversion table
| Worsted Count (Nw) | Decitex (dtex) |
|---|---|
| 8 Nw | 1107.264839 dtex |
| 12 Nw | 738.1765593 dtex |
| 16 Nw | 553.6324195 dtex |
| 20 Nw | 442.9059356 dtex |
| 24 Nw | 369.0882797 dtex |
| 30 Nw | 295.2706237 dtex |
| 36 Nw | 246.0588531 dtex |
| 40 Nw | 221.4529678 dtex |
| 48 Nw | 184.5441398 dtex |
| 60 Nw | 147.6353119 dtex |
| 64 Nw | 138.4081049 dtex |
| 80 Nw | 110.7264839 dtex |
Where it's used
Worsted Count are used for worsted wool and acrylic yarns, while decitex appear in polyester and nylon filament yarns (for example 167 dtex). 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 decitex | 8858.118712 dtex |
| Nw to tex | 885.8118712 tex |
| Nw to denier | 7972.306841 den |
| Nw to Ne | 0.6666666667 Ne |
| 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 decitex?
dtex = 8858.118712 ÷ Nw. The two systems are inversely related, so divide the constant by the value; do not multiply. For example, 8858.118712 ÷ 15 = 590.5412474 dtex.
Why does a higher Nw give a lower dtex?
Worsted Count counts length per unit mass (an indirect system), while decitex 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 dtex 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 Decitex (Nw to dtex). Retrieved October 25, 2026, from https://scientificconverters.com/yarn-count/worsted-count-to-decitex/
IEEE
Scientific Converters, "Convert Worsted Count to Decitex (Nw to dtex)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/yarn-count/worsted-count-to-decitex/