Denier to Tex Converter
Divide by nine: convert any denier to tex, the ISO yarn unit used in standards, test reports and technical textiles.
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Constants from ASTM D2260 and the exact yard and pound. Checked 9 November 2026.
Your yarn
Unit you have
Denier: grams per 9,000 m
Convert to
Tex: grams per 1,000 m
For filament yarn: the 36 in 75/36 or the f48 in dtex 167 f48.
Converted count
210 denier in Tex
23.33 tex
tex = denier ÷ 9210 ÷ 9 = 23.33
Every unit
- Denierwhat you entered
- 210 denier
- Texgrams per 1,000 m
- 23.33 tex
- Decitex (dtex)grams per 10,000 m
- 233.3 dtex
- English cotton count (Ne)840-yard hanks per pound
- 25.31 Ne
- Metric count (Nm)km per kg (metres per gram)
- 42.86 Nm
- Worsted count (Nw)560-yard hanks per pound
- 37.96 Nw
- Yorkshire woollen count (Ny)256-yard skeins per pound
- 83.04 Ny
Higher denier, tex or dtex means a thicker yarn. Higher Ne, Nm, Nw or Ny means a finer one.
Denier to Tex chart
| Denier | Tex | Dtex |
|---|---|---|
| 1.667 | 16.67 | |
| 3.333 | 33.33 | |
| 5.556 | 55.56 | |
| 8.333 | 83.33 | |
| 11.11 | 111.1 | |
| 16.67 | 166.7 | |
| 23.33 | 233.3 | |
| 27.78 | 277.8 | |
| 33.33 | 333.3 | |
| 46.67 | 466.7 | |
| 66.67 | 666.7 | |
| 93.33 | 933.3 | |
| 111.1 | 1,111 | |
| 186.7 | 1,867 |
Tap a value in the first column to load it into the converter.
How to use it
Type the count in denier, for example 210.
Read the Tex on the right, with every other unit listed under it.
Or tap a value in the Denier to Tex chart to load it.
Denier to Tex: when you need it
Tex is the yarn unit in ISO standards and most technical specifications: grams per 1,000 metres. Denier is the same idea over 9,000 metres. Converting is a single division by 9, but it is easy to slip when one document mixes the two, for example a sewing thread in tex and a fabric yarn in denier.
Coarse filament such as 210, 420 and 840 denier, common in bag and luggage fabrics, comes to 23.33, 46.67 and 93.33 tex.
Formula: tex = denier ÷ 9
tex = denier ÷ 9. Denier is the weight of 9,000 m and tex the weight of 1,000 m, so tex is exactly one ninth of the denier.
Worked example
210 denier: 210 ÷ 9 = 23.33 tex.
More conversions
To go the other way, use the Tex to Denier 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 denier to tex?
Divide by 9: tex = denier ÷ 9. 75 denier ÷ 9 = 8.333 tex.
What is 210 denier in tex?
23.33 tex (210 ÷ 9), or 233.3 dtex.
What is 1,680 denier in tex?
186.7 tex (1,680 ÷ 9), which is 1,867 dtex.
Why do standards use tex instead of denier?
ISO 1144 sets out the tex system as the universal way to state the linear density of fibres and yarns, in grams per 1,000 m, so test standards and lab reports use it. Denier remains common in filament trading, which is why converting between the two is a daily job.
Is tex a direct or an indirect count?
Direct, like denier: the bigger the number, the heavier the yarn. 30 denier is 3.333 tex, a fine yarn; 600 denier is 66.67 tex, a coarse one.
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