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Yarn Count Converter — Ne, Nm, Tex, Denier & dtex
Convert yarn count between all five major count systems: Ne (English Cotton), Nm (Metric), Tex, Denier and Decitex (dtex). Instant bidirectional conversion using Tex as the ISO base unit, with a yarn fineness guide and end-use reference table. No account needed — numbers update as you type.
Conversion formulas are mathematically exact using the Tex base unit per ISO 1144. Results are rounded to 3 decimal places for practical use. For critical specifications, verify with your spinning mill's official test certificate.
Step By Step
How to Use This Calculator
5 steps
- Select the count system you want to convert from — the system description updates to explain its unit definition.
- Enter the yarn count value. For Ne: enter a number like 30 (meaning 30s Ne). For Tex: enter grams per 1,000 m. For Denier: enter grams per 9,000 m.
- All five equivalent counts appear instantly.
- The fineness indicator (ultra-fine to very coarse) classifies the yarn by its Ne equivalent.
- The reference table at the bottom shows common end-use applications for each count range.
Worked Example
Worked example — Convert 30s Ne (standard T-shirt yarn)
Use this sample to sanity-check your inputs and understand what the final result represents.
- 1Select: Convert from Ne · Enter: 30
- 2Ne 30 → Tex = 590.5 ÷ 30 = 19.68
- 3Denier = 19.68 × 9 = 177.2
- 4Nm = 1000 ÷ 19.68 = 50.8
- 5dtex = 19.68 × 10 = 196.8
Final Result
30s Ne = 19.68 Tex = 177.2 Denier = 50.8 Nm = 196.8 dtex. Classification: Medium — standard T-shirts, casual knitwear.
Methodology
Yarn Count Conversion — ISO 1144 base formulas
This section explains the calculation logic, assumptions, and source material used to make the result more trustworthy and easier to verify.
All conversions route through Tex as the universal base unit per ISO 1144:2016 'Textiles — Universal system for designating linear density (Tex System)'. Ne to Tex: Tex = 590.5 ÷ Ne (590.5 = yards per pound in a standard hank × lb/g conversion). Nm to Tex: Tex = 1,000 ÷ Nm. Denier to Tex: Tex = Denier ÷ 9. dtex to Tex: Tex = dtex ÷ 10. Reverse conversions multiply or divide Tex by the same constants. Ne and Nm are indirect systems (higher number = finer yarn); Tex, Denier and dtex are direct systems (higher number = coarser yarn). Reference: ISO 1144:2016; Textile Institute, Textile Terms and Definitions (11th ed.).
Practical Guidance
Yarn count in practice — what textile professionals know
- 1Ne (English count) is the most widely used system in Bangladesh cotton spinning mills and in specifications from US and UK buyers — learn to think in Ne if you work with South Asian cotton
- 2Denier is standard for synthetic filament yarns: 75D polyester for woven linings, 40D spandex for stretch fabrics — always check whether the denier refers to a single filament (dpf) or the full multifilament yarn
- 3A folded yarn is written as '2/30s Ne' — two 30s yarns twisted together; effective count = 30 ÷ 2 = 15s Ne; stronger and more even than single, used in woven shirting and premium knitwear
- 4Higher Ne cotton yarn is significantly more expensive per kg: 80s Ne can cost 2–3× the price of 20s Ne because it requires longer-staple cotton and more ginning and spinning passes
- 5The Tex system is preferred in European technical specifications and all ISO standards; Ne is preferred commercially in Bangladesh and India; Denier is used worldwide for synthetics — knowing all three is necessary for international textile work
- 6ASTM D1059 and ISO 2060 define the standard test methods for yarn linear density measurement — relevant when verifying supplier count claims
Frequently Asked Questions
What is yarn count and why does it matter?+
Yarn count is a numerical expression of yarn fineness — how thin or thick the yarn is per unit of length or weight. It directly determines the fabric's GSM, texture, strength, appearance and cost. A finer yarn (higher Ne) produces lighter, softer, more expensive fabric; a coarser yarn produces heavier, stronger, cheaper fabric. In the garment industry, yarn count is specified in the fabric TDS (Technical Data Sheet) and must match the approved lab dip standard. Using the wrong count produces fabric with incorrect weight, hand feel and performance.
What is the difference between Ne and Nm yarn count?+
Both Ne and Nm are indirect systems where a higher number means a finer yarn. Ne (English Cotton Count) is defined as the number of 840-yard hanks per pound of yarn — a historical definition from British textile mills. Nm (Metric Count) is defined as the number of kilometres of yarn per kilogram — a cleaner metric definition. Their relationship: Nm = Ne × 1.6935. Ne 30 = Nm 50.8. Ne is the dominant system in Bangladesh, India and Pakistan cotton mills and in US/UK buyer specs. Nm is used in European spinning mills and in some technical specifications.
What yarn count is used for T-shirt fabric in Bangladesh?+
Bangladesh T-shirt exports predominantly use 20s–30s Ne combed or carded ring-spun cotton. 20s Ne (≈29.5 Tex) gives a heavier, more textured fabric at lower cost. 24s–26s Ne is the most common for standard retail. 30s Ne (≈19.7 Tex) produces smoother, lighter fabric for premium retailers. Compact-spun yarn in 30s–40s Ne is used for higher-end buyers like H&M Conscious or premium private labels. Open-end (OE) spun yarn in 16s–20s Ne is used for basic economy T-shirts and workwear — it is cheaper but rougher than ring-spun.
What does '2/30s Ne' mean and how do I calculate its effective count?+
2/30s Ne (also written 30/2 Ne) means two 30s single yarns are twisted (plied) together to form a two-ply yarn. The effective linear density of a plied yarn is: effective count = individual count ÷ number of plies (for Ne and Nm) or individual Tex × number of plies (for Tex). So 2/30s Ne has an effective count of 30 ÷ 2 = 15s Ne, but the strength is much higher than a single 15s yarn. Plied yarns are standard in woven shirting (poplin, oxford), fine knitwear and premium socks. For Tex: two 19.68 Tex singles → effective Tex = 19.68 × 2 = 39.35 Tex.
Why is Denier used for synthetic filament yarns?+
Denier originated with silk count measurement in the French textile industry (named after the French coin once used as a weight standard) and became the industry standard for all continuous filament yarns when synthetic fibres emerged in the 1930s and 40s. It is defined as the weight in grams of 9,000 metres of yarn. 75D polyester means 9,000 m of that yarn weighs 75 g. Denier is intuitive for filaments because it scales linearly with weight — a 150D yarn is exactly twice as heavy per length as 75D. ISO 1144 formally adopted Tex as the international standard, but Denier remains universal in commercial practice for polyester, nylon, viscose and spandex.