Convert Metric Count to Kilotex (Nm to ktex)
Metric Count and kilotex are inversely related: ktex = 1 ÷ Nm, so 15 Nm = 0.06666666667 ktex.
Also searched as metric count to ktex, metric count in ktex, metric count into kilotex, Nm to ktex, Nm in kilotex, Nm into kilotex, metric count to kilotex and Nm to kilotex converter.
1 Nm = 1 ktex
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk Nm to kilotex converter to paste a column from Excel.
How to Convert Metric Count to Kilotex
- ktex = 1 ÷ Nm
- Nm = 1 ÷ ktex
- Example: convert 15 Nm to ktex: 1 ÷ 15 = 0.06666666667 ktex
Formula
ktex = 1 ÷ Nm
Derivation from SI units:
- Nm = kilometres of yarn per kilogram, so tex = 1000 ÷ Nm
- 1 ktex = 1 g per metre = 1000 tex = 10⁻³ kg/m (exact)
- Solving for ktex: ktex = 1 ÷ Nm (a higher Nm means a lower ktex)
Both units are defined exactly, so the factor is exact. Metric Count definition: metric count; Kilotex definition: kilotex.
Worked examples
- A reading of 34 Nm converts to 0.02941176471 ktex.
1 ÷ 34 = 0.02941176471 ktex - A value of 68 Nm is 0.01470588235 ktex.
1 ÷ 68 = 0.01470588235 ktex
Metric Count to Kilotex conversion table
| Metric Count (Nm) | Kilotex (ktex) |
|---|---|
| 10 Nm | 0.1 ktex |
| 17 Nm | 0.05882352941 ktex |
| 20 Nm | 0.05 ktex |
| 24 Nm | 0.04166666667 ktex |
| 34 Nm | 0.02941176471 ktex |
| 40 Nm | 0.025 ktex |
| 50 Nm | 0.02 ktex |
| 60 Nm | 0.01666666667 ktex |
| 68 Nm | 0.01470588235 ktex |
| 80 Nm | 0.0125 ktex |
| 100 Nm | 0.01 ktex |
| 135 Nm | 0.007407407407 ktex |
Where it's used
Metric Count are used for wool, linen and spun yarns in continental Europe, while kilotex appear in card and draw-frame sliver (about 3–5 ktex). 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.
Metric Count to other yarn count units
| Conversion | 1 Nm equals |
|---|---|
| Nm to kilotex | 1 ktex |
| Nm to tex | 1000 tex |
| Nm to denier | 9000 den |
| Nm to Ne | 0.5905412474 Ne |
| Nm to decitex | 10000 dtex |
| Nm to Nw | 0.8858118712 Nw |
| Nm to woollen count | 1.937713468 NY |
| Nm to linen lea | 1.653515493 NeL |
Show 1 more units
| Nm to kilogram per metre | 0.001 kg/m |
|---|
Frequently asked questions
What is the formula for metric count to kilotex?
ktex = 1 ÷ Nm. The two systems are inversely related, so divide the constant by the value; do not multiply. For example, 1 ÷ 15 = 0.06666666667 ktex.
Why does a higher Nm give a lower ktex?
Metric 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 Nm to ktex conversion exact?
Yes. Both units are defined exactly, and 1 Nm is exactly 1 ktex.
Sources
- ASTM D2260, Standard Tables of Conversion Factors and Equivalent Yarn Numbers Measured in Various Numbering Systems, ASTM International , Metric count (Nm).
- 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 Metric Count to Kilotex (Nm to ktex). Retrieved October 25, 2026, from https://scientificconverters.com/yarn-count/nm-to-kilotex/
IEEE
Scientific Converters, "Convert Metric Count to Kilotex (Nm to ktex)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/yarn-count/nm-to-kilotex/