Textile Denier & Thread Count Converter
Enter a yarn count in any system and get the equivalent in all others. Denier, tex, dtex, metric count (Nm), English cotton count (Ne). Optional fabric GSM estimator from thread density. Nothing uploaded.
Input
Fabric GSM Estimator (optional)
Enter thread density and yarn counts for a GSM estimate:
Converted Values
| Unit | Value |
|---|---|
| Denier (d) | - |
| Tex (tex) | - |
| Dtex (dtex) | - |
| Metric count (Nm) | - |
| English cotton count (Ne) | - |
Learn more: Yarn count systems and textile specifications
Why five different yarn count systems exist
Fabric specifications, supplier datasheets, and design documents use different yarn count systems depending on region and industry. A 70 denier nylon from an American supplier, a 78 dtex from a European mill, and an Nm 128 from a UK spinner are the same yarn described three different ways. This converter handles all five systems in a single step.
Denier vs tex: the most common conversion
Both measure yarn linear density (mass per unit length). Denier is the mass in grams of 9,000 metres. Tex is the mass in grams of 1,000 metres. So Tex = Denier / 9. A 70 denier yarn equals 7.8 tex. Denier is used primarily for filament fibres (nylon, polyester stockings); tex is the ISO standard; dtex (grams per 10,000m) is used in the EU.
Understanding denier ratings for clothing
40 denier means that 9,000 metres of yarn weighs 40 grams. Lower denier numbers mean finer, more sheer yarn. 10-20 denier is very sheer hosiery; 40 is semi-sheer; 80 is opaque; 200+ is used for leggings and activewear. For fabric designers and mills, this rating directly determines the fabric's transparency and durability.
Bidirectional conversion across all systems
Enter any value in denier, tex, dtex, Nm (metric count), or Ne (English cotton count) and get the equivalents in all others. The fabric GSM estimator uses thread density to estimate final fabric weight, useful for procurement and specification documents.
Frequently asked questions
Denier = grams per 9000m; Tex = grams per 1000m. So Tex = Denier / 9. A 70d yarn is 7.8 tex. Denier is used for filament fibres; tex is ISO standard; dtex is EU standard.
9000m of yarn weighs 40g. Lower denier = finer, sheerer. 10-20d is very sheer; 40d is semi-sheer; 80d is opaque; 200d+ is for leggings and activewear.
Nm is inverse - metres per gram. Denier = 9000 / Nm. Nm 100 = 90 denier; Nm 50 = 180 denier. The converter handles all conversions bidirectionally.