1. What is Grams Per Square Metre (GSM)?

GSM (grams per square metre) is a metric measurement of the weight per unit area of paper, fabric, or other sheet materials. It's commonly used in industries like paper manufacturing, textiles, and packaging to specify material density.

2. How Does the Calculator Work?

The calculator uses the simple formula:

Where:

• \( Weight \) — Mass of the material in grams (g)
• \( Area \) — Surface area in square metres (m²)

Explanation: The formula calculates how many grams of material are distributed over each square metre of surface area.

3. Importance of GSM Calculation

Details: GSM is crucial for quality control in manufacturing, determining material strength, thickness, and suitability for specific applications. It helps compare different materials objectively.

4. Using the Calculator

Tips: Enter the weight in grams and area in square metres. Both values must be greater than zero. For accurate results, measure weight precisely and calculate area carefully.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between GSM and basis weight?
A: Basis weight measures weight per specific sheet count (like 500 sheets) at standard size, while GSM measures weight per actual area regardless of sheet size.

Q2: What are typical GSM values for paper?
A: Standard copy paper is about 80 gsm, cardstock 200-300 gsm, business cards 250-400 gsm, and newspaper about 45 gsm.

Q3: How do I convert GSM to ounces per square yard?
A: Multiply GSM by 0.0295 to get oz/yd². For example, 100 gsm ≈ 2.95 oz/yd².

Q4: Why is GSM important in textiles?
A: In fabrics, GSM indicates thickness and durability. Higher GSM generally means heavier, more durable fabric (e.g., 300+ gsm for heavy hoodies).

Q5: How can I measure GSM at home?
A: Weigh a known area of material (like a 10cm × 10cm square = 0.01m²), then multiply the weight by 100 to get approximate GSM.