Convert Tex to Denier (tex to den)
1 tex = 9 denier (den). 1 den = 0.1111111111 tex. Example: 20 tex = 20 × 9 = 180 den.
Also searched as tex to den, tex in den, tex into denier, tex in denier, tex to denier, tex to denier converter and how many denier in a tex.
1 tex = 9 den
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk tex to denier converter to paste a column from Excel.
How to Convert Tex to Denier
- 1 tex = 9 den
- 1 den = 0.1111111111 tex
- Example: convert 20 tex to den: 20 tex = 20 × 9 den = 180 den
Formula
den = tex × 9
Derivation from SI units:
- 1 tex = 1 g per 1000 m = 10⁻⁶ kg/m (exact)
- 1 den = 1 g per 9000 m = 1/9 tex ≈ 1.111 × 10⁻⁷ kg/m (exact)
- 1 tex = 0.000001 kg/m ÷ 1.111111111111 × 10⁻⁷ kg/m per den = 9 den
Both units are defined exactly, so the factor is exact. Tex definition: tex; Denier definition: denier.
Worked examples
- A 20 tex spun yarn is 180 den.
20 tex × 9 = 180 den - A 1.67 tex staple fibre is 15.03 den.
1.67 tex × 9 = 15.03 den
Tex to Denier conversion table
| Tex | Denier (den) |
|---|---|
| 5 tex | 45 den |
| 7.4 tex | 66.6 den |
| 10 tex | 90 den |
| 14.76 tex | 132.84 den |
| 16.4 tex | 147.6 den |
| 20 tex | 180 den |
| 25 tex | 225 den |
| 29.5 tex | 265.5 den |
| 37 tex | 333 den |
| 50 tex | 450 den |
| 59 tex | 531 den |
| 100 tex | 900 den |
Where it's used
Yarn and fibre linear densities in tex are converted to denier for filament yarn, hosiery and US fibre specifications. Multiply by 9.
Tex to other yarn count units
| Conversion | 1 tex equals |
|---|---|
| tex to denier | 9 den |
| tex to Ne | 590.5412474 Ne |
| tex to decitex | 10 dtex |
| tex to Nm | 1000 Nm |
| tex to Nw | 885.8118712 Nw |
| tex to kilotex | 0.001 ktex |
| tex to woollen count | 1937.713468 NY |
| tex to linen lea | 1653.515493 NeL |
Show 1 more units
| tex to kilogram per metre | 0.000001 kg/m |
|---|
Frequently asked questions
How many denier is 1 tex?
Exactly 9 denier: 1 tex = 1 g per 1000 m, which is 9 g per 9000 m.
How many denier are in 1 tex?
1 tex = 9 den.
How do I convert tex to denier?
Multiply the value in tex by 9. For example, 20 tex × 9 = 180 den.
Is the tex 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
- 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 , 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".
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 Tex to Denier (tex to den). Retrieved October 25, 2026, from https://scientificconverters.com/yarn-count/tex-to-denier/
IEEE
Scientific Converters, "Convert Tex to Denier (tex to den)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/yarn-count/tex-to-denier/