Convert Denier to Decitex (den to dtex)
1 denier (den) = 1.111111111 decitex (dtex). 1 dtex = 0.9 den. Example: 40 den = 40 × 1.111111111 = 44.44444444 dtex.
Also searched as denier to dtex, denier in dtex, denier into decitex, den to dtex, den in decitex, den into decitex, denier to decitex, den to decitex converter and how many decitex in a denier.
1 den = 1.111111111 dtex
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk denier to decitex converter to paste a column from Excel.
How to Convert Denier to Decitex
- 1 den = 1.111111111 dtex
- 1 dtex = 0.9 den
- Example: convert 40 den to dtex: 40 den = 40 × 1.111111111 dtex = 44.44444444 dtex
Formula
dtex = den × 1.111111111111
Derivation from SI units:
- 1 den = 1 g per 9000 m = 1/9 tex ≈ 1.111 × 10⁻⁷ kg/m (exact)
- 1 dtex = 1 g per 10 000 m = 0.1 tex = 10⁻⁷ kg/m (exact)
- 1 den = 1.111111111111 × 10⁻⁷ kg/m ÷ 1 × 10⁻⁷ kg/m per dtex = 1.111111111111 dtex
Both units are defined exactly, so the factor is exact. Denier definition: denier; Decitex definition: decitex.
Worked examples
- A 40 den elastane yarn is 44.44444444 dtex.
40 den × 1.111111111 = 44.44444444 dtex - A 1.5 den fibre is 1.666666667 dtex.
1.5 den × 1.111111111 = 1.666666667 dtex
Denier to Decitex conversion table
| Denier (den) | Decitex (dtex) |
|---|---|
| 10 den | 11.11111111 dtex |
| 15 den | 16.66666667 dtex |
| 20 den | 22.22222222 dtex |
| 30 den | 33.33333333 dtex |
| 40 den | 44.44444444 dtex |
| 50 den | 55.55555556 dtex |
| 70 den | 77.77777778 dtex |
| 75 den | 83.33333333 dtex |
| 100 den | 111.1111111 dtex |
| 150 den | 166.6666667 dtex |
| 210 den | 233.3333333 dtex |
| 420 den | 466.6666667 dtex |
| 840 den | 933.3333333 dtex |
| 1000 den | 1111.111111 dtex |
Where it's used
Denier values are converted to decitex for European fibre and filament specifications and ISO 1144 reporting. Divide by 0.9.
Denier to other yarn count units
| Conversion | 1 den equals |
|---|---|
| denier to decitex | 1.111111111 dtex |
| denier to tex | 0.1111111111 tex |
| denier to Ne | 5314.871227 Ne |
| denier to Nm | 9000 Nm |
| 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
How many dtex is 1 denier?
1 den = 1.111111111 dtex.
How many decitex are in 1 denier?
1 den = 1.111111111 dtex.
How do I convert denier to decitex?
Multiply the value in den by 1.111111111. For example, 40 den × 1.111111111 = 44.44444444 dtex.
Is the den to dtex 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".
- 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 Denier to Decitex (den to dtex). Retrieved October 25, 2026, from https://scientificconverters.com/yarn-count/denier-to-decitex/
IEEE
Scientific Converters, "Convert Denier to Decitex (den to dtex)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/yarn-count/denier-to-decitex/