Ne to Nm Converter
Convert an English cotton count into metric count (Nm) for European buyers, wool and linen blends or lab reports.
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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
Metric count (Nm): km per kg (metres per gram)
Converted count
40 Ne in Nm
67.73 Nm
Nm = Ne × 1.693440 × 1.6934 = 67.73
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 Nm chart
| Ne | Nm | Tex |
|---|---|---|
| 16.93 | 59.05 | |
| 20.32 | 49.21 | |
| 27.09 | 36.91 | |
| 33.87 | 29.53 | |
| 40.64 | 24.61 | |
| 50.8 | 19.68 | |
| 54.19 | 18.45 | |
| 60.96 | 16.4 | |
| 67.73 | 14.76 | |
| 84.67 | 11.81 | |
| 101.6 | 9.842 | |
| 118.5 | 8.436 | |
| 135.5 | 7.382 | |
| 169.3 | 5.905 |
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 Nm on the right, with every other unit listed under it.
Or tap a value in the Ne to Nm chart to load it.
Ne to Nm: when you need it
European buyers and blended-yarn spinners often work in metric count, while your yarn is sold as 30s or 40s. Multiplying the English count by 1.6934 gives Nm.
The factor comes from the two definitions. Nm is kilometres per kilogram; Ne is 840-yard hanks per pound. One hank per pound is 0.768096 km per 0.45359237 kg, which is 1.6934 km per kg.
Formula: Nm = Ne × 1.6934
Nm = Ne × 1.6934, the same as Ne ÷ 0.5905. Charts that use 1.69 or 1.693 are rounding it.
Worked example
40 Ne: 40 × 1.6934 = 67.73 Nm.
More conversions
To go the other way, use the Nm 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
How do I convert Ne to Nm?
Multiply by 1.6934: Nm = Ne × 1.6934. 30s × 1.6934 = Nm 50.8.
What is 40s in metric count?
Nm 67.73, or Nm 68 rounded to a whole count. In tex it is 14.76.
What is 2/60s in Nm?
Each 60s ply is Nm 101.6, so 2/60s is Nm 2/101.6 in metric terms and behaves like a single Nm 50.8, the metric count of a 30s.
Where does 1.6934 come from?
It is the ratio of the two definitions: one 840-yard hank (0.768096 km) per pound (0.45359237 kg) is 1.6934 km per kg.
Which is finer, Ne 30 or Nm 60?
Nm 60. Ne 30 is only Nm 50.8, and in both systems a bigger number is a finer yarn. Nm 60 is 35.43 Ne.
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