GSM Calculator
Calculate Fabric & Non Woven GSM Online
Fast, simple and accurate GSM calculation using weight, length and width (in CM or MM).
What is GSM?
GSM means Grams per Square Meter. It is a standard measurement used to describe the weight of fabric, non woven fabric, paper and other sheet materials.
For example, a material marked as 100 GSM weighs approximately 100 grams for an area of one square meter.
GSM is commonly used in the textile, packaging, printing, paper and non woven industries to compare material weight and specification.
🧮 GSM Calculator (in CM)
Enter the sample weight in grams and its length and width in centimeters.
GSM Calculation Formula (Centimeters)
Where:
- Weight = sample weight in grams
- Length = sample length in centimeters
- Width = sample width in centimeters
- 10,000 = conversion factor because 1 square meter = 10,000 square centimeters
GSM Calculation Example (CM)
Suppose a fabric sample weighs 12 grams and its size is 20 cm × 10 cm.
GSM = (12 × 10,000) ÷ (20 × 10)
GSM = 120,000 ÷ 200
GSM = 600 GSM
GSM to Weight Formula
If you already know the GSM and want to calculate the approximate weight of a fabric sample, use this formula:
Example
For a 100 GSM material measuring 100 cm × 100 cm:
Weight = 100 × 100 × 100 ÷ 10,000
Weight = 100 grams
GSM Calculator in CM
If your fabric sample dimensions are measured in centimeters, you can directly use the calculator above.
The formula is:
This is useful for fabric, non woven sheets, paper and other flat materials where the sample weight and dimensions are known.
📏 GSM Calculator in MM (Millimeters)
Enter the sample weight in grams and its length and width in millimeters.
GSM Calculation Formula in MM
When measuring dimensions in millimeters (mm), use the multiplier 1,000,000 because 1 square meter = 1,000,000 square millimeters.
MM Example:
For an A4 size paper sample measuring 210 mm × 297 mm weighing 5 grams:
GSM = (5 × 1,000,000) ÷ (210 × 297)
GSM = 5,000,000 ÷ 62,370
GSM = 80.17 GSM
Non Woven Fabric GSM Calculator
GSM is especially important for non woven fabric because fabric weight is commonly specified by GSM.
For example, non woven fabrics may be available in different GSM specifications such as 50 GSM, 60 GSM, 70 GSM, 80 GSM, 90 GSM, 100 GSM, 120 GSM and more.
The calculator can help you check the approximate GSM of a non woven fabric sample when you know its weight, length and width.
GSM Calculator for Woven Fabric
The same basic GSM formula can also be used for woven fabric. Take a representative fabric sample, measure its dimensions, weigh it accurately and enter the values into the calculator.
For better accuracy, use a properly measured sample and a precise weighing scale.
GSM Calculation Formula in Excel
You can calculate GSM in Microsoft Excel using the same mathematical formula.
For CM Dimensions:
For MM Dimensions:
*(Where cell A2 = Weight in grams, B2 = Length, and C2 = Width)*
Common GSM Values
| GSM | General Description |
|---|---|
| 50 GSM | Very lightweight material |
| 60 GSM | Lightweight non woven material |
| 70 GSM | Common lightweight packaging material |
| 80 GSM | Medium-light material |
| 100 GSM | Medium/heavier packaging material |
| 120 GSM | Higher weight material |
| 150 GSM | Heavy material |
| 200 GSM | Heavy-duty material |
| 300 GSM | Very heavy material |
Actual strength, thickness and performance depend on the material type, manufacturing process and construction, not GSM alone.
MM to GSM Calculator – Can Thickness be Converted Directly?
Millimeter (mm) thickness and GSM are different measurements. GSM measures mass per unit area, while mm thickness generally measures depth. Therefore, thickness in mm cannot normally be converted directly to GSM without additional information about the material's density.
GSM Calculator Weight
GSM can be used to estimate material weight when the area is known. The basic relationship is:
For a larger roll or sheet, calculate its total area first and then multiply the area by GSM.
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Frequently Asked Questions (FAQ)
How to calculate GSM in MM?
How to calculate GSM in CM?
What is the formula for GSM calculation?
What is 300 GSM fabric weight?
What is 120 GSM in mm?
What is 200 GSM in weight?
Can I calculate GSM of non woven fabric?
Can GSM calculation be done in Excel for MM?
Can mm thickness be converted directly to GSM?
Important Note
This calculator provides a mathematical GSM calculation based on the values entered by the user. Actual commercial or laboratory GSM may vary because of moisture, sample selection, weighing accuracy, manufacturing variation and testing conditions.