Denier to Dtex Calculator
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Table of Contents
What is Denier and Dtex?
- Denier is a unit that measures the weight in grams of 9,000 meters of fiber.
- Dtex (decitex) is a unit that measures the weight in grams of 10,000 meters of fiber.
- Tex is another related unit that measures grams per 1,000 meters.
These units show the linear density of yarns and fibers. Textile professionals use them to define fineness, strength, and fabric quality.
Denier to Dtex Conversion Formula
The basic formula is:
dtex = denier × 10 ÷ 9
Reverse conversion is:
denier = dtex × 9 ÷ 10
This means:
- 1 denier = 1.11 dtex
- 1 dtex = 0.9 denier
Why the Formula Works
Denier is based on 9,000 meters.
Dtex is based on 10,000 meters.
The ratio of 10,000 to 9,000 equals 10/9.
That ratio creates the conversion factor used in every calculation.
Step-by-Step Conversion Process
- Note the denier value.
- Multiply the denier by 10.
- Divide the result by 9.
- Round the value to the required decimal places.
- Record the dtex value in the specification sheet.
Worked Examples
- 75 denier × 10 ÷ 9 = 83.33 dtex
- 15 denier × 10 ÷ 9 = 16.67 dtex
- 300 denier × 10 ÷ 9 = 333.33 dtex
- 0.8 denier × 10 ÷ 9 = 0.89 dtex
These examples show how simple the formula is for both fine and coarse yarns.
Practical Notes for Textile Use
- Lab technicians measure yarn weight for a fixed length to calculate linear density.
- Engineers record denier per filament when filament count affects fabric handle.
- Production teams check denier and dtex values before final approval of material.
- Export suppliers often list both units to reduce confusion in global trade.
Denier per Filament (DPF)
Denier per filament (DPF) = Total Denier ÷ Number of Filaments.
- Lower DPF = finer, softer fabric (used in sportswear or hosiery).
- Higher DPF = stronger, heavier fabric (used in technical textiles, ropes, or upholstery).
When to Use Denier, Dtex, or Tex
- Denier is common in apparel and hosiery.
- Dtex is popular in Europe and technical textiles.
- Tex is standard in academic and industry testing.
Global manufacturers often include both denier and dtex in product data sheets to cover all markets.
Quick Conversion Table
| Denier | Dtex |
|---|---|
| 1 | 1.11 |
| 2 | 2.22 |
| 3 | 3.33 |
| 5 | 5.56 |
| 10 | 11.11 |
| 15 | 16.67 |
| 20 | 22.22 |
| 30 | 33.33 |
| 40 | 44.44 |
| 50 | 55.56 |
| 75 | 83.33 |
| 100 | 111.11 |
| 150 | 166.67 |
| 200 | 222.22 |
| 250 | 277.78 |
| 300 | 333.33 |
| 400 | 444.44 |
| 500 | 555.56 |
| 600 | 666.67 |
| 700 | 777.78 |
| 800 | 888.89 |
| 900 | 1000.00 |
| 1000 | 1111.11 |
- Hosiery and fine filament yarns (1D–40D).
- Apparel and woven fabrics (50D–300D).
- Technical textiles, ropes, and upholstery (400D–1000D).
This simple table saves time for quick reference.
Conversion Checklist for Textile Engineers
- Confirm original denier value.
- Apply conversion formula (×10 ÷ 9).
- Round according to tolerance.
- Include dtex and denier in the datasheet.
- Use online calculator for batch conversion.
Denier and dtex are essential yarn specifications. The formula dtex = denier × 10 ÷ 9 gives exact results for all yarns and fibers. Clear conversion improves communication between designers, buyers, and manufacturers. A calculator or quick table makes the process faster and more accurate.