GSM Calculator – Measure Fabric Weight in Grams per Square Metre

The GSM calculator is a simple tool used by textile professionals, buyers, and quality inspectors to measure fabric weight. GSM stands for grams per square metre, a key indicator of fabric thickness, durability, and quality. Whether you are testing a cotton swatch, denim, upholstery, or paper sheets, calculating GSM helps you make better decisions in production and purchasing.

What is GSM in Fabric?

GSM means Grams per Square Metre. It represents the fabric weight for a one-metre square area. A higher GSM indicates a heavier and denser fabric, while a lower GSM means the fabric is lighter and thinner.

  • 80–120 GSM: Lightweight fabrics like voile, georgette, tissue paper.
  • 150–220 GSM: Medium weight like t-shirts, dress materials, notebooks.
  • 260–360 GSM: Heavy textiles like denim, canvas, and card stock.
  • 400+ GSM: Industrial, upholstery, carpet, and premium quality paper.

 

GSM Calculator – How It Works

Our fabric GSM calculator is designed to instantly compute fabric weight. You only need three details:

  1. Length of the sample (in cm, m, mm, inch, or feet)
  2. Width of the sample
  3. Weight of the sample (in grams or kilograms)

Once entered, the calculator applies the formula to provide the fabric GSM value.

 

Formula to Calculate GSM

The standard GSM formula is:

GSM = (Sample Weight in Grams × 10,000) ÷ (Length × Width in cm²)

For example, if your swatch is 30 cm × 30 cm and weighs 5 g:

GSM = (5 × 10,000) ÷ (900) = 55.5 GSM

Online GSM Calculator Tool

Use our interactive GSM calculator below to instantly check fabric GSM. Simply input your sample size and weight, and the tool will calculate grams per square metre automatically. This saves time, reduces manual error, and ensures precise results for both textiles and paper industries.

GSM Calculator

Calculate GSM (grams per square metre) of fabric, paper or board. Enter sample weight and dimensions.

Formula: GSM = (Weight in grams × 10,000) ÷ Area in cm²

Why is GSM Important in Textiles and Paper?

  Quality Control: Ensures consistency in production.

  Cost Estimation: Helps in pricing fabric or paper accurately.

  Buyer Confidence: Buyers compare GSM before ordering bulk.

  Application Fit: Heavy GSM fabrics for upholstery, low GSM for summer wear.

 

Typical GSM Ranges in Fabrics

  70–100 GSM: Lightweight cotton, polyester, tissue paper

  120–180 GSM: Shirts, dresses, printing paper

  200–300 GSM: Sweatshirts, denim, canvas

  400+ GSM: Carpets, upholstery, industrial fabrics

 

FAQ – GSM Calculator and Fabric Measurement

Cut a fabric swatch, measure its length, width, and weight, then apply the GSM formula.

Yes, the same formula applies for paper GSM or cardboard GSM measurement.

Higher GSM often means more durability and thickness, while lower GSM is lighter and breathable.

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