How Does the GSM vs PT Unit System Affect Packaging Design

When working with paper, especially in packaging, it’s important to know how thick or heavy it is. Two common ways to measure this are GSM (Grams per Square Meter) and PT (Points). These units help you pick the right paper for your design or product. But they are not the same. This guide will explain the difference between GSM and PT in paper, when to use each one, and how to convert between them. We will also share tables to help you understand both systems better. If you’re designing or ordering packaging, understanding GSM vs PT unit system is very helpful. At BonitoPack, we often help businesses choose the right paper type using both GSM and PT standards.

What Is GSM?

GSM stands for Grams per Square Meter. It tells you how heavy a sheet of paper is. The higher the GSM number, the heavier and thicker the paper feels. It is commonly used in many parts of the world, especially for:

• Printing
• Flyers
• Brochures
• Packaging boxes

GSM measures weight, not thickness directly. But heavier paper usually feels thicker too.

What Is PT?

PT, or Points, is a unit that shows the thickness of paper. It is used mostly in the United States and Canada. One point equals 1/1000 of an inch. So, 10 PT paper is 0.010 inches thick. A higher PT number means a thicker sheet. You often find PT used for:

• Business cards
• Packaging cartons
• Covers of books or magazines

Unlike GSM, PT is a physical measurement of thickness, not weight.

GSM vs PT Unit System: Key Differences

These two systems don’t always match perfectly. A 300 GSM paper can be 12 PT in one case, but 14 PT in another, depending on the material. That’s why using a GSM to PT conversion chart is important. And at BonitoPack, we help customers convert and choose wisely.

Understanding Paper Thickness Units

Both GSM and PT help in understanding paper thickness units, but they tell different stories. GSM is best when you care about how heavy or strong the paper is. PT is better when you need exact measurements of thickness, like for folding or packaging design. Paper made from different materials can have the same GSM but different PT. For example:

• A 300 GSM cardboard may measure 18 PT.
• A 300 GSM coated paper may only measure 14 PT.

That’s why knowing both numbers gives a clearer picture.

GSM to PT Conversion Chart

This table shows approximate conversions. It helps designers and buyers make better choices.

This GSM to PT conversion chart is not exact. Always ask for samples or check with a reliable packaging provider like BonitoPack.

When to Use GSM vs PT in Packaging Design

The GSM vs PT for packaging design debate depends on your goals:

Choose GSM if:

• You want to compare paper by weight
• You’re working with international printers
• Your focus is mailing cost, folding, or light packaging

Choose PT if:

• You need precise thickness measurement
• You’re producing in North America
• Your package needs to feel luxurious or stiff

Designers often need both values. For example, if you’re making a folding carton for cosmetics, you may want 14 PT paper (around 350 GSM). But you also need to know if it folds well or handles printing without cracking.

Common GSM and PT Combinations for Packaging

At BonitoPack, we use many different GSM and PT levels for different packaging needs. Here’s another useful chart:

Each of these combinations works well depending on product size and weight. Using the right paper ensures your packaging looks good and stays strong.

Why GSM vs PT Unit System Matters

Choosing the wrong unit can cause issues. If you order 300 GSM paper thinking it’s very thick, but it turns out to be soft, your box may collapse. If you pick 18 PT paper for a mailer and it’s too heavy, you may pay extra for shipping. That’s why the GSM vs PT unit system needs to be understood carefully for packaging design and structural integrity. At BonitoPack, we can show you physical samples, explain the GSM and PT values, and help you choose the right material.

Final Tips on Choosing the Right Unit

Here are a few final tips:

• Ask for both GSM and PT values if available
• Always test a sample before placing a large order
• Remember that finish (glossy, matte, coated) also changes feel
• Don’t rely on GSM alone for thickness decisions
• Use conversion charts as rough guides, not fixed rules

Conclusion

In the world of paper packaging, knowing the GSM vs PT unit system is important. GSM measures weight, while PT shows thickness. They are not directly equal but are both useful in different ways. In order to make the best decision, you will quite frequently have to use both, particularly when it comes to packaging design. When you need professional assistance in choosing the right paper or satisfy your demands, BonitoPack will help you with both GSM and PT standards so that your packaging could be the best.

FAQs

Can GSM and PT be directly converted?
No, because GSM measures weight and PT measures thickness. You need a chart to estimate.

Which is better for packaging, GSM or PT?
Both are useful. PT helps with thickness, GSM with strength and weight.

Does higher GSM mean thicker paper?
Often yes, but it depends on the paper type and finish.

What should I choose for a luxury product box?
Use at least 400 GSM or 16 PT for a premium feel.