Ne to Denier Converter
Find the denier of a spun yarn from its English count, to match it with a filament yarn or compare yarn weight per metre.
- Free
- No signup
- Works on your phone
Constants from ASTM D2260 and the exact yard and pound. Checked 9 November 2026.
Your yarn
Unit you have
English cotton count (Ne): 840-yard hanks per pound
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
40 Ne in Denier
132.9 denier
denier = 5,314.87 ÷ Ne5,314.87 ÷ 40 = 132.9
Every unit
- Deniergrams per 9,000 m
- 132.9 denier
- Texgrams per 1,000 m
- 14.76 tex
- Decitex (dtex)grams per 10,000 m
- 147.6 dtex
- English cotton count (Ne)what you entered
- 40 Ne
- Metric count (Nm)km per kg (metres per gram)
- 67.73 Nm
- Worsted count (Nw)560-yard hanks per pound
- 60 Nw
- Yorkshire woollen count (Ny)256-yard skeins per pound
- 131.3 Ny
Higher denier, tex or dtex means a thicker yarn. Higher Ne, Nm, Nw or Ny means a finer one.
Ne to Denier chart
| Ne | Denier | Dtex |
|---|---|---|
| 885.8 | 984.2 | |
| 531.5 | 590.5 | |
| 332.2 | 369.1 | |
| 265.7 | 295.3 | |
| 221.5 | 246.1 | |
| 177.2 | 196.8 | |
| 166.1 | 184.5 | |
| 132.9 | 147.6 | |
| 106.3 | 118.1 | |
| 88.58 | 98.42 | |
| 66.44 | 73.82 | |
| 53.15 | 59.05 |
Tap a value in the first column to load it into the converter.
How to use it
Type the count in Ne, for example 40.
Read the Denier on the right, with every other unit listed under it.
Or tap a value in the Ne to Denier chart to load it.
Ne to Denier: when you need it
Cotton and blended spun yarns are sold by English count, while filament is sold by denier. When a weaver swaps a spun weft for a filament one, or a trader checks whether a polyester yarn gives the same weight as a cotton quality, the first step is to put the count into denier.
It is the same constant as denier to Ne, read the other way round. A finer count gives a smaller denier, so 80s is a much lighter yarn than 20s.
Formula: denier = 5,314.87 ÷ Ne
5,314.87 comes from 9 × 590.54, where 590.54 links tex and Ne through the exact yard (0.9144 m) and pound (453.59237 g). Some charts use 5,315 or 5,314.
Worked example
40 Ne: 5,314.87 ÷ 40 = 132.9 denier.
More conversions
To go the other way, use the Denier to Ne 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
What is 40s count in denier?
40s (40 Ne) is 132.9 denier (5,314.87 ÷ 40). In dtex that is 147.6.
How do I convert Ne to denier?
Divide 5,314.87 by the count. 30s: 5,314.87 ÷ 30 = 177.2 denier. 60s: 88.58 denier.
What is 2/40s in denier?
2/40s is two 40s yarns twisted together. Each ply is 132.9 denier, so the plied yarn is about 265.7 denier, the same as a single 20s. Twist takes up a little length, so the real figure is slightly higher.
Is 20s cotton finer than 150 denier polyester?
No. 20s is 265.7 denier, so it is heavier per metre than 150 denier. The cotton count that matches 150 denier is about 35.43s.
Why do some charts show 132.88 for 40s instead of 132.87?
They divide by a rounded 5,315 instead of 5,314.87. For 40s that gives 132.88 against 132.87 denier, a gap far smaller than the variation within any yarn lot.
Textile ERP
Yarn, grey, job work and finished stock in one system built around your process.
Mind Over Matter builds it for Surat businesses and clients across India. Reply within 24 hours.
Free tools
More free tools
Fabric GSM calculator
Find a fabric's GSM from a weighed sample, or estimate it from ends and picks per inch and yarn counts.
Fabric metre to kg
Convert fabric between metres and kilograms using its GSM and width, and see the weight per metre.
Diamond mm to carat
Convert a diamond's size in millimetres to its approximate carat weight, and back, for round and fancy shapes. Carats to grams and cents too.