Convert Kilotex to Worsted Count (ktex to Nw)
Kilotex and worsted count are inversely related: Nw = 0.8858118712 ÷ ktex, so 15 ktex = 0.05905412474 Nw.
Also searched as kilotex to Nw, kilotex in Nw, kilotex into worsted count, ktex to Nw, ktex in worsted count, ktex into worsted count, kilotex to worsted count and ktex to worsted count converter.
1 ktex = 0.8858118712 Nw
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk kilotex to Nw converter to paste a column from Excel.
How to Convert Kilotex to Worsted Count
- Nw = 0.8858118712 ÷ ktex
- ktex = 0.8858118712 ÷ Nw
- Example: convert 15 ktex to Nw: 0.8858118712 ÷ 15 = 0.05905412474 Nw
Formula
Nw = 0.8858118711724 ÷ ktex
Derivation from SI units:
- 1 ktex = 1 g per metre = 1000 tex = 10⁻³ kg/m (exact)
- Nw = number of 560-yard hanks per pound, so tex = 885.8119 ÷ Nw
- Solving for Nw: Nw = 0.8858118711724 ÷ ktex (a higher ktex means a lower Nw)
Both units are defined exactly, so the factor is exact. Kilotex definition: kilotex; Worsted Count definition: worsted count.
Worked examples
- A reading of 2.5 ktex converts to 0.3543247485 Nw.
0.8858118712 ÷ 2.5 = 0.3543247485 Nw - A value of 4 ktex is 0.2214529678 Nw.
0.8858118712 ÷ 4 = 0.2214529678 Nw
Kilotex to Worsted Count conversion table
| Kilotex (ktex) | Worsted Count (Nw) |
|---|---|
| 0.5 ktex | 1.771623742 Nw |
| 1 ktex | 0.8858118712 Nw |
| 2 ktex | 0.4429059356 Nw |
| 2.5 ktex | 0.3543247485 Nw |
| 3 ktex | 0.2952706237 Nw |
| 3.5 ktex | 0.253089106 Nw |
| 4 ktex | 0.2214529678 Nw |
| 5 ktex | 0.1771623742 Nw |
| 6 ktex | 0.1476353119 Nw |
| 8 ktex | 0.1107264839 Nw |
Where it's used
Kilotex are used for card and draw-frame sliver (about 3–5 ktex), 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.
Kilotex to other yarn count units
| Conversion | 1 ktex equals |
|---|---|
| kilotex to Nw | 0.8858118712 Nw |
| kilotex to tex | 1000 tex |
| kilotex to denier | 9000 den |
| kilotex to Ne | 0.5905412474 Ne |
| kilotex to decitex | 10000 dtex |
| kilotex to Nm | 1 Nm |
| kilotex to woollen count | 1.937713468 NY |
| kilotex to linen lea | 1.653515493 NeL |
Show 1 more units
| kilotex to kilogram per metre | 0.001 kg/m |
|---|
Frequently asked questions
What is the formula for kilotex to worsted count?
Nw = 0.8858118712 ÷ ktex. The two systems are inversely related, so divide the constant by the value; do not multiply. For example, 0.8858118712 ÷ 15 = 0.05905412474 Nw.
Why does a higher ktex give a lower Nw?
Worsted Count counts length per unit mass (an indirect system), while kilotex counts mass per unit length (a direct system). A finer yarn has a higher indirect number and a lower direct number.
Is the ktex 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 Kilotex to Worsted Count (ktex to Nw). Retrieved October 25, 2026, from https://scientificconverters.com/yarn-count/kilotex-to-worsted-count/
IEEE
Scientific Converters, "Convert Kilotex to Worsted Count (ktex to Nw)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/yarn-count/kilotex-to-worsted-count/