Convert Metric Count to Denier (Nm to den)
Metric Count and denier are inversely related: den = 9000 ÷ Nm, so 15 Nm = 600 den.
Also searched as metric count to den, metric count in den, metric count into denier, Nm to den, Nm in denier, Nm into denier, metric count to denier and Nm to denier converter.
1 Nm = 9000 den
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk Nm to denier converter to paste a column from Excel.
How to Convert Metric Count to Denier
- den = 9000 ÷ Nm
- Nm = 9000 ÷ den
- Example: convert 15 Nm to den: 9000 ÷ 15 = 600 den
Formula
den = 9000 ÷ Nm
Derivation from SI units:
- Nm = kilometres of yarn per kilogram, so tex = 1000 ÷ Nm
- 1 den = 1 g per 9000 m = 1/9 tex ≈ 1.111 × 10⁻⁷ kg/m (exact)
- Solving for den: den = 9000 ÷ Nm (a higher Nm means a lower den)
Both units are defined exactly, so the factor is exact. Metric Count definition: metric count; Denier definition: denier.
Worked examples
- A reading of 34 Nm converts to 264.7058824 den.
9000 ÷ 34 = 264.7058824 den - A value of 68 Nm is 132.3529412 den.
9000 ÷ 68 = 132.3529412 den
Metric Count to Denier conversion table
| Metric Count (Nm) | Denier (den) |
|---|---|
| 10 Nm | 900 den |
| 17 Nm | 529.4117647 den |
| 20 Nm | 450 den |
| 24 Nm | 375 den |
| 34 Nm | 264.7058824 den |
| 40 Nm | 225 den |
| 50 Nm | 180 den |
| 60 Nm | 150 den |
| 68 Nm | 132.3529412 den |
| 80 Nm | 112.5 den |
| 100 Nm | 90 den |
| 135 Nm | 66.66666667 den |
Where it's used
Metric Count are used for wool, linen and spun yarns in continental Europe, while denier appear in hosiery and tights (for example 15–40 den). 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 denier | 9000 den |
| Nm to tex | 1000 tex |
| Nm to Ne | 0.5905412474 Ne |
| Nm to decitex | 10000 dtex |
| Nm to Nw | 0.8858118712 Nw |
| Nm to kilotex | 1 ktex |
| 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 denier?
den = 9000 ÷ Nm. The two systems are inversely related, so divide the constant by the value; do not multiply. For example, 9000 ÷ 15 = 600 den.
Why does a higher Nm give a lower den?
Metric Count counts length per unit mass (an indirect system), while denier 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 den 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 , 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".
- ASTM D2260, Standard Tables of Conversion Factors and Equivalent Yarn Numbers Measured in Various Numbering Systems, ASTM International , Denier 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 Denier (Nm to den). Retrieved October 25, 2026, from https://scientificconverters.com/yarn-count/nm-to-denier/
IEEE
Scientific Converters, "Convert Metric Count to Denier (Nm to den)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/yarn-count/nm-to-denier/