Tex to Denier Converter
Multiply by nine: convert tex sizes on sewing thread and technical yarn specs into the denier filament traders use.
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Constants from ASTM D2260 and the exact yard and pound. Checked 9 November 2026.
Your yarn
Unit you have
Tex: grams per 1,000 m
Convert to
Denier: grams per 9,000 m
For filament yarn: the 36 in 75/36 or the f48 in dtex 167 f48.
Converted count
27 tex in Denier
243 denier
denier = tex × 927 × 9 = 243
Every unit
- Deniergrams per 9,000 m
- 243 denier
- Texwhat you entered
- 27 tex
- Decitex (dtex)grams per 10,000 m
- 270 dtex
- English cotton count (Ne)840-yard hanks per pound
- 21.87 Ne
- Metric count (Nm)km per kg (metres per gram)
- 37.04 Nm
- Worsted count (Nw)560-yard hanks per pound
- 32.81 Nw
- Yorkshire woollen count (Ny)256-yard skeins per pound
- 71.77 Ny
Higher denier, tex or dtex means a thicker yarn. Higher Ne, Nm, Nw or Ny means a finer one.
Tex to Denier chart
| Tex | Denier | Ne |
|---|---|---|
| 45 | 118.1 | |
| 72 | 73.82 | |
| 90 | 59.05 | |
| 108 | 49.21 | |
| 144 | 36.91 | |
| 162 | 32.81 | |
| 180 | 29.53 | |
| 216 | 24.61 | |
| 243 | 21.87 | |
| 270 | 19.68 | |
| 315 | 16.87 | |
| 360 | 14.76 | |
| 405 | 13.12 | |
| 540 | 9.842 | |
| 630 | 8.436 | |
| 720 | 7.382 | |
| 945 | 5.624 | |
| 1,215 | 4.374 |
Tap a value in the first column to load it into the converter.
How to use it
Type the count in tex, for example 27.
Read the Denier on the right, with every other unit listed under it.
Or tap a value in the Tex to Denier chart to load it.
Tex to Denier: when you need it
Industrial sewing threads are labelled by tex size, such as Tex 27, Tex 40 or Tex 70, and ISO-based specs give yarn in tex as well. Filament traders and weavers think in denier. Multiplying by 9 turns one into the other, so thread and yarn can be compared with local rates.
The factor is exact. Tex is the weight of 1,000 m in grams and denier the weight of 9,000 m, so the denier figure is always nine times the tex figure, with no rounding involved.
Formula: denier = tex × 9
denier = tex × 9, exactly.
Worked example
27 tex: 27 × 9 = 243 denier.
More conversions
To go the other way, use the Denier to Tex converter. To see one count in all seven units at once, including worsted and woollen counts, open the yarn count converter. To estimate fabric weight from yarn counts, try the fabric GSM calculator.
Sources: ASTM D2260, Standard Tables of Conversion Factors and Equivalent Yarn Numbers (current edition D2260-24); ISO 1144:2016, the tex system. Checked 9 November 2026.
FAQ
Questions
How do I convert tex to denier?
Multiply by 9: denier = tex × 9. 20 tex × 9 = 180 denier.
What is Tex 27 in denier?
243 denier (27 × 9), or 270 dtex. In English cotton count it is 21.87 Ne.
What is Tex 40 in denier?
360 denier. Don't confuse it with 40s cotton: 40s is only 14.76 tex (132.9 denier), a much finer yarn.
What is 1 tex in denier?
Exactly 9 denier. Tex weighs 1,000 m and denier 9,000 m, so the factor is a clean 9 with no rounding.
Is tex the same as dtex?
No. Dtex is a tenth of a tex, so 1 tex = 10 dtex. Tex 27 is 270 dtex and 243 denier.
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