How to Measure and Calculate GSM of Fabric: A Step-by-Step Guide

To find the GSM (grams per square meter) of a fabric, you can follow these steps:

1. Measure the Fabric's Weight:

Cut a sample piece of fabric with a known area, typically 10 cm x 10 cm (which is 100 cm²).

Weigh this sample accurately using a digital scale. Record the weight in grams.

2. Calculate the Area of the Sample:

For a 10 cm x 10 cm sample, the area is 100 cm²

3. Calculate GSM:

Use the formula

Since your sample is in cm², convert the area to m²

Therefore

4. Example:

If the sample weighs 20 grams

Alternative Method:

• Use a GSM cutter or a fabric GSM measurement device for quick testing.
• Some fabrics have manufacturer specifications indicating GSM, which can be used directly.