Convert Denier to Metric Count (den to Nm)
Denier and metric count are inversely related: Nm = 9000 ÷ den, so 15 den = 600 Nm.
Also searched as denier to Nm, denier in Nm, denier into metric count, den to Nm, den in metric count, den into metric count, denier to metric count and den to metric count converter.
1 den = 9000 Nm
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk denier to Nm converter to paste a column from Excel.
How to Convert Denier to Metric Count
- Nm = 9000 ÷ den
- den = 9000 ÷ Nm
- Example: convert 15 den to Nm: 9000 ÷ 15 = 600 Nm
Formula
Nm = 9000 ÷ den
Derivation from SI units:
- 1 den = 1 g per 9000 m = 1/9 tex ≈ 1.111 × 10⁻⁷ kg/m (exact)
- Nm = kilometres of yarn per kilogram, so tex = 1000 ÷ Nm
- Solving for Nm: Nm = 9000 ÷ den (a higher den means a lower Nm)
Both units are defined exactly, so the factor is exact. Denier definition: denier; Metric Count definition: metric count.
Worked examples
- A reading of 40 den converts to 225 Nm.
9000 ÷ 40 = 225 Nm - A value of 150 den is 60 Nm.
9000 ÷ 150 = 60 Nm
Denier to Metric Count conversion table
| Denier (den) | Metric Count (Nm) |
|---|---|
| 10 den | 900 Nm |
| 15 den | 600 Nm |
| 20 den | 450 Nm |
| 30 den | 300 Nm |
| 40 den | 225 Nm |
| 50 den | 180 Nm |
| 70 den | 128.5714286 Nm |
| 75 den | 120 Nm |
| 100 den | 90 Nm |
| 150 den | 60 Nm |
| 210 den | 42.85714286 Nm |
| 420 den | 21.42857143 Nm |
| 840 den | 10.71428571 Nm |
| 1000 den | 9 Nm |
Where it's used
Denier are used for hosiery and tights (for example 15–40 den), while metric count appear in wool, linen and spun yarns in continental Europe. 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.
Denier to other yarn count units
| Conversion | 1 den equals |
|---|---|
| denier to Nm | 9000 Nm |
| denier to tex | 0.1111111111 tex |
| denier to Ne | 5314.871227 Ne |
| denier to decitex | 1.111111111 dtex |
| denier to Nw | 7972.306841 Nw |
| denier to kilotex | 0.0001111111111 ktex |
| denier to woollen count | 17439.42121 NY |
| denier to linen lea | 14881.63944 NeL |
Show 1 more units
| denier to kilogram per metre | 1.111111111 × 10⁻⁷ kg/m |
|---|
Frequently asked questions
What is the formula for denier to metric count?
Nm = 9000 ÷ den. The two systems are inversely related, so divide the constant by the value; do not multiply. For example, 9000 ÷ 15 = 600 Nm.
Why does a higher den give a lower Nm?
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 den to Nm 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 , Denier system.
- 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 , Metric count (Nm).
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 Denier to Metric Count (den to Nm). Retrieved October 25, 2026, from https://scientificconverters.com/yarn-count/denier-to-nm/
IEEE
Scientific Converters, "Convert Denier to Metric Count (den to Nm)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/yarn-count/denier-to-nm/