how to calculate yarn count from gsm

Learn How to Calculate Yarn Count from GSM: A Guide

Understanding yarn count and GSM is essential in the textile industry. Yarn count represents the thickness of a yarn, while GSM (grams per square meter) measures the weight of a fabric. Understanding how to compute yarn count from GSM (Grams per Square Meter) is essential for assessing the quality and functionality of a fabric.

Start by learning how to calculate yarn count from GSM (Grams per Square Meter), and then discover the skill of determining yarn weight when the label is absent.

Key Takeaways:

  • Yarn count and GSM are crucial measurements in the textile industry
  • Calculating yarn count from GSM helps determine fabric quality and performance
  • The yarn count formula and conversion between GSM and Tex play essential roles in yarn count calculation

how to calculate yarn count from gsm

Understanding Yarn Count and GSM

The textile industry relies heavily on accurate measurements of fabric weight and yarn thickness. Two critical measurements used in the industry are yarn count and GSM (Grams per Square Meter).

Yarn count is the numerical expression of the fineness or thickness of a yarn, usually expressed as the weight in grams of one kilometer of the yarn. A higher yarn count means a thinner yarn, and a lower one means a thicker yarn.

On the contrary, GSM represents the weight of a fabric per unit area. This measurement is determined by weighing one square meter of the fabric, which is why it’s called Grams per Square Meter. A higher GSM means a heavier and denser fabric, while a lower GSM means a lighter and thinner fabric.

Understanding the relationship between yarn count and GSM is crucial for successful textile production. The yarn count calculation primarily depends on the fabric’s weight and area, which the GSM determines. The yarn count calculation also provides the necessary information for determining the finished product’s strength, texture, and quality.

Yarn Count Calculation

The yarn count calculation is a standard method used in the textile industry to determine the thickness of a yarn. To calculate the yarn count, you need to know the weight of the yarn and its length. The equation used to determine yarn count is:

Yarn count (ne) = Length (m) x Weight (g) / 1000


  • Length is the length of the yarn in meters
  • Weight is the weight of the yarn in grams
  • The Factor 1000 converts the weight from grams to kilograms and the length from meters to kilometers.

Once you have calculated the yarn count, you can use it to determine the thickness of the yarn and its suitability for a particular application.

It is also essential to note that various factors can affect the accuracy of the yarn count calculation. These factors include the yarn’s thickness, twist, and density. Understanding these variables’ significance is vital to ensure accurate calculations and achieve the desired results.

Converting GSM to yarn count involves a formula discussed in the subsequent section.

The Yarn Count Formula

One of the critical elements of understanding how to calculate yarn count from GSM is knowing the yarn count formula. The formula for calculating yarn count is:

Yarn Count = (Length of Yarn in Yards * Weight of Yarn in Pounds) / Number of Yarns

This formula may seem daunting initially, but it is relatively straightforward once you break it down into components.

First, measure the length of yarn in yards, which refers to the total length of the yarn you use. Next, measure the weight of the yarn in pounds, which refers to the overall weight of the yarn. Finally, count the number of yarns, which refers to the number of individual strands of yarn in the sample.

Once you have these three pieces of information, plug them into the formula and solve for the yarn count. The resulting number will give you the yarn count value for the sample.

It is important to note that the yarn count formula is just one method for calculating yarn count, and there are other techniques available depending on the yarn and textile being used. However, this formula is a helpful starting point for understanding how yarn count is calculated and can be used in various scenarios.

Converting GSM to Tex

Tex is a unit of measurement commonly used in the textile industry to describe the linear density of a yarn. It represents the weight in grams of 1,000 meters of yarn. Converting GSM to Tex can help determine the yarn count of a fabric.

The formula for converting GSM to Tex is:

GSM ÷ (Length in meters x Width in meters) x 1,000 = Tex

For example, if a fabric has a GSM of 200, a length of 50 meters, and a width of 1 meter:

GSM Length (m) Width (m) Tex
200 50 1 4

In this example, the resulting Tex value is 4, indicating that the yarn in the fabric has a linear density of 4 grams per 1,000 meters.

Converting GSM to Tex can be valuable in determining yarn count and fabric quality, mainly when used with the yarn count formula.

Step-by-Step Guide to Calculating Yarn Count from GSM

Calculating yarn count from GSM may initially appear intricate, but it can be deconstructed into straightforward steps. Here is a step-by-step guide to help you calculate yarn count from GSM:

  1. Determine the yarn weight. First, you need to know the weight of the yarn you use. This can be measured in grams or ounces. In this guide, we’ll assume you are working with a yarn that weighs 100 grams.
  2. Calculate the length of the yarn. Next, you need to measure the length of the yarn. You can do this by unrolling a small section and measuring it with a ruler. Let’s say you measure 50 centimeters (cm).
  3. Calculate the total length of the yarn. Once you have measured a section of the yarn, calculate the total length in meters. This can be done by multiplying the length you measured by 20. In this case, 50 cm x 20 = 1000 cm or 10 meters.
  4. Calculate the area of the fabric. Measure the area of the fabric in square meters. For example, if you have a square piece of fabric one meter by one meter, the area would be one square meter.
  5. Calculate the GSM. Divide the weight of the fabric by the area of the fabric. Let’s say your fabric weighs 200 grams and has an area of 2 square meters. 200 g / 2 m² = 100 GSM.
  6. Calculate the yarn count. Finally, divide the total length of the yarn by the weight of the yarn. For example, if you have 10 meters of yarn that weighs 100 grams, the yarn count would be 10/100 or 0.1 Ne (English count). Alternatively, if you prefer the metric system, you can use Tex count; in that case, the yarn count would be 10/1000 or 10 Tex.

By adhering to these uncomplicated steps, you can determine the yarn count from GSM with a fair degree of ease. Always double-check your calculations to ensure accuracy, and remember that different measurements may be required for different types of fabrics or yarns.

Factors Affecting Yarn Count Calculation

Determining yarn count from GSM necessitates considering several factors that can impact the precision of the calculation. These factors are crucial to understand for achieving precise yarn count calculations:

Yarn Thickness

The thickness of the yarn can significantly affect the yarn count. Thicker yarn will have a lower count, while thinner yarn will have a higher count.


Density refers to the amount of yarn within a given area. Higher yarn density can result in a higher yarn count measurement.


The amount of twists in the yarn can also impact the yarn count. More twisted yarn will have a lower count, while less twisted yarn will have a higher count.

It is essential to consider these factors when measuring yarn count from GSM, as failing to do so can lead to inaccurate results. Therefore, it is necessary to understand how these factors relate to yarn count calculation and how they can be controlled to ensure precise measurements of yarn count.

Using a Yarn Count Calculator

Calculating yarn count from GSM can be time-consuming, especially when dealing with large quantities of yarn. Fortunately, there are several yarn count calculators accessible online that can streamline the process and save you time and effort.

Yarn count calculators work by inputting the necessary variables, such as GSM and the number of yarns in a sample, and then automatically calculating the yarn count. Such formulas can be precious when handling intricate calculations that involve multiple variables.

Popular Yarn Count Calculators

Several yarn count calculators are available online, each with unique features and capabilities. Some of the most popular yarn count calculators include:

Calculator Features Website
TexCalc Calculates yarn count, GSM, and Tex
Yarn Calculator Calculates yarn count, length, weight, and diameter
Uster® Yarn Count Calculator Calculates yarn count, GSM, and Tex

When employing a yarn count calculator, it is crucial to input the accurate variables and validate the outcomes for accuracy. While calculators can be helpful, they could be more foolproof and occasionally produce inaccurate results.

It is also important to note that yarn count calculators may only suit some situations. In some cases, manual calculations may be required to ensure the highest level of accuracy.

Examples of Yarn Count Calculation

Let’s look at some practical examples to understand better how to calculate yarn count from GSM.

Example 1:

GSM 200
Length 200 m
Weight 500 g

To calculate the yarn count, we first need to calculate the total length of the yarn:

Total length = GSM x 10000 / Weight

Total length = 200 x 10000 / 500 = 4000 m

Next, we divide the total length by the weight of the yarn:

Yarn count = Total length / Weight

Yarn count = 4000 / 500 = 8

Therefore, the yarn count is 8.

Example 2:

GSM 150
Length 1000 m
Weight 250 g

To calculate the yarn count, we first need to calculate the total weight of the yarn:

Total weight = GSM x Length / 10000

Total weight = 150 x 1000 / 10000 = 15 g

Next, we divide the total length by the weight of the yarn:

Yarn count = Total length / Weight

Yarn count = 1000 / 15 = 67

Therefore, the yarn count is 67.

Example 3:

GSM 120
Length 500 m
Weight 200 g

To calculate the yarn count, we first need to calculate the total length of the yarn:

Total length = GSM x 10000 / Weight

Total length = 120 x 10000 / 200 = 6000 m

Next, we divide the total length by the weight of the yarn:

Yarn count = Total length / Weight

Yarn count = 6000 / 200 = 30

Therefore, the yarn count is 30.

By working through these examples, readers can better understand how to calculate yarn count accurately and confidently.

Common Mistakes in Yarn Count Calculation

Despite the straightforward nature of yarn count calculation, many people make mistakes that can affect the accuracy of their results. Here are some of the most common mistakes to avoid:

  • Using the wrong formula: Use the correct formula for the type of yarn count you are calculating. Using the right formula can lead to correct results.
  • Incorrect units: Make sure to use consistent units throughout the calculation. For example, use millimeters for thickness and grams for weight measurement.
  • Using the wrong GSM: Ensure you use the correct GSM value for the measured fabric or material. Using the proper value can lead to accurate results.
  • Not accounting for yarn density: The density of the yarn can vary depending on factors such as twist, fiber length, and yarn diameter. Accounting for this can lead to correct calculations.
  • Incorrect weight measurement: Ensure you are using the correct weight measurement of the yarn, as this can affect the resulting yarn count. For example, using the weight of a cone of yarn instead of the weight of a fixed length can lead to incorrect results.

Steering clear of these errors can enhance the precision of your yarn count computations and create higher-quality products.

Tips for Accurate Yarn Count Calculation

Accurately calculating yarn count from GSM is essential in the textile industry. Here are some tips to help you ensure precise calculations:

1. Use a precise measuring instrument

Use a precise instrument like a digital scale to obtain accurate GSM measurements. Ensure the instrument is calibrated and set to the appropriate unit of measurement.

2. Check for moisture content.

Moisture can affect the weight of a textile material, which in turn can affect GSM measurements. Ensure that the sample is dried thoroughly before taking measurements.

3. Take multiple measurements

To reduce the risk of errors, take multiple measurements from different sample areas and calculate the average. This helps to account for any inconsistencies or variations in the material.

4. Be mindful of material thickness.

The thickness of the material can affect the accuracy of GSM measurements. For thicker materials, ensure that the edges of the sample are included and that the sample is evenly distributed on the measuring surface.

5. Keep environmental factors in mind.

Environmental conditions, including temperature and humidity, can indeed influence the weight of the material, which, in turn, can affect the accuracy of GSM measurements. Take measurements in a controlled environment to minimize the impact of these factors.

6. Verify the yarn count formula.

Double-check the yarn count formula and ensure all variables are accounted for correctly. The formula needs to be corrected to avoid inaccurate calculations.

7. Practice consistency

Consistency plays a pivotal role in achieving precise yarn count calculations. Use the same measurement units and equipment for each calculation, and follow the same steps and procedures to ensure consistency across all calculations.

Advancements in Yarn Count Measurement

The textile industry has witnessed significant advancements in yarn count measurement in recent years. These advancements have revolutionized how yarn count is calculated, making the process more accurate and efficient.

Automated systems, such as the Evenness Tester and Fibre Fineness Tester, are significant innovations in yarn count measurement. These systems measure yarn properties, such as diameter, elongation, and tensile strength, and provide highly accurate results. Utilizing these systems saves time and eliminates the potential for human error in measurements.

Another significant advancement in yarn count measurement is the use of Laser Micrometry. This technology allows for precise yarn diameter and density measurements, resulting in more accurate yarn count calculations. Laser micrometry has become increasingly popular in the textile industry due to its ability to measure yarn properties with high precision and accuracy.

The advent of Digital Imaging Technology has also impacted the yarn count measurement process. Digital imaging technology allows for quick and accurate measurement of yarn thickness, twist, and density. This innovation has led to the development of user-friendly software, enabling yarn count calculations to be easily performed.

Overall, the advancements in yarn count measurement have revolutionized the textile industry and how yarn count is calculated. Utilizing these technologies ensures that the yarn count calculations are precise and accurate, leading to better-quality textile products.


Comprehending how to compute yarn count from GSM is a fundamental skill for textile industry professionals. It enables them to effectively assess and manage the quality and performance of fabrics. Accurate yarn count calculations are crucial for producing high-quality fabrics and garments from designers to manufacturers.

By adhering to the detailed instructions outlined in this article, you can calculate yarn count from GSM with confidence and ease. It’s also important to remember the common mistakes and factors that can affect your calculations and use helpful tools like yarn count calculators.

Apply Your Knowledge

Now that you’ve learned how to calculate yarn count from GSM, it’s time to put your knowledge to the test. Take time to calculate the yarn count of different fabrics and compare your results to those manufacturers provide. By doing so, you can better understand the complexities of fabric production and refine your skills.

By staying up to date with advancements in yarn count measurement, you can also stay ahead of the curve in the industry. As new technologies emerge, it’s essential to watch for advancements to improve the accuracy and efficiency of yarn count calculations.

Overall, mastering the calculation of yarn count from GSM is a valuable skill that can benefit anyone in the textile industry. By heeding the advice and recommendations presented in this article, you can enhance the precision of your calculations and manufacture superior fabrics and apparel.

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