Filament yarn is filament fiber that tends to be measured in yards, sometimes meters. Being made from manmade fibers, synthetic fiber like Silk, filament yarn gets twisted into a yarn. The shiny and smoothy filament yarn count have multiple ways to count which we will be seeing in this article briefly.

What is Yarn Count?

Every yarn, be it a staple of filament, has its yarn count. Yarn count refers to the numerical value that predicts yarn quality-fine or coarse, weight, and thickness. Filament yarn differs greatly compared to other fiber-made yarns. Besides, all these factors, yarn count talks about the yarn’s durability and strength. It also affects the fabric’s price-expensiveness and cheaper ability.

Checking Yarn Count for Filament Yarn

Filament yarn has the yarn count usually measured in denier (D). Here, the denier gets calculated by using a weight per unit length (WPL) system. In that case, the filament fabric weight remains unchanged.

Here, the increase in the denier number causes the yarn to be heavier, thicker, and cheaper. The small denier number reflects the lightness and the costliness of the yarn. Taiwan country has the most common denier specification for polyester-made garments consecutively, 50D, 75D, 100D, and 150D. (1 D= No. of grams per 9000 meters)

Denier per filament: The weight in terms of the grams of 9000 meters of an individual filament gets calculated by involving the yarn denier. After that, the denier gets divided by the filament yarn number.

Filament Yarn Count Conversion

Different Kinds of Filament Yarn Counts

75D/72F Filament Yarn count: What does it mean?

Since filament yarn is composed of filament fibers, figure-75D/72F denotes that the yarn is 75 deniers with the composition of 72 strands of filament fiber.

Microfiber Yarn Count

If we see that the filament count is greater than the denier, we will call the co as co-microfiber.

Tex: The way to measure filament which is less common in nature. Tex is utilized to express the continuous filament yarns’ fineness.

1 tex = 1 gram = 1000 yarn meters

Is Converting Yarn Count to Denier (Den) Necessary?

It is not necessary to convert yarn count to denier. If we want to customize the fabric to a filament yarn from the staple one, the below yarn count conversion formula will help:

  • 5315 / denier = yarn count
  • 5315 / yarn count = denier


The less the denier the finer the yarn count- this is the principle that solely applies to the filament yarn count. If we talk about the 150 deniers (D), we will have a finer yarn count, thinner compared to any other, also, lighter filament yarn. But the less the denier the less the strength. We will find the 150 Denier filament yarn to be less strong.



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Mohammad Mahedi Hasan

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Mahedi Hasan, a Textile Engineer, as well as a Top Rated content writer at Upwork, Level 02 Seller at Fiverr, Level 02 Publisher at Ezoic. A passionate textile ad fashion content writer, fashion SEO expert, and fashion web designer. Having a B.Sc. in Textile Engineering from Textile Engineering College, Noakhali (TECN). Department is Apparel Engineering. Highly Experienced fashion writer for the last 3+ yrs. Established Textile Details Website website to enhance professional Fashion Blogging skills.