Understanding What Paper Quality Means

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I know that I’ve been using “80 grams” paper, but I didn’t really understand why it was called “80 grams” until today.

What does gsm mean?

GSM is an abbreviation for grammage, or grams per square metre. It indicates the weight of a square metre of paper. Standard copy paper in Singapore is approximately 80 gsm, which means that a standard A4 sheet weighs 5 grams, and a 500 sheet ream weighs 2.5 kg.

Is gsm the same as thickness?

Not exactly. Thickness is measured in microns (millionths of a metre, or thousandths of
a millimetre). Standard copy paper typically has a thickness of about 100 microns, so
a 500 sheet ream is about 5cm thick. If two sheets have the same density, then their
thicknesses will be directly proportional to their grammage.

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About the author

Alvin Poh

I've over 17 years of entrepreneurship experience, having built a tech company to be the top in the country, which was subsequently acquired for an 8-figure sum. As CEO, I led the company through robust growth to 150 employees across 4 countries. After the acquisition, I embraced minimalism, sold off my personal possessions, and started living around the world.

Read more about my story here.

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About Author

I've over 17 years of entrepreneurship experience, having built a tech company to be the top in the country, which was subsequently acquired for an 8-figure sum. As CEO, I led the company through robust growth to 150 employees across 4 countries. After the acquisition, I embraced minimalism, sold off my personal possessions, and started living around the world.

Read more about my story here.