Paper is an essential part of our daily life and one of those inventions that will likely never go away.
Understanding the weight of paper can be a confusing business, especially for those not in the printing industry.
The actual weigh of paper, which is normally provided by the manufacturer per 500 sheets, will depend on the sheet size and thickness.
For example, a single sheet of A4 paper that is 75gsm (Grammage Per Square Meter) will weigh 4.69grams.
While a sheet of A4 which is 160gsm will weigh 10 grams.
There are around 6 grammage weights for the various paper sizes that you can buy and they are 75gsm, 80gsm, 90gsm, 100gsm, 110gsm, 120gsm, and 160gsm.
There is also a formula that can be used to calculate the weight of any piece of paper.
The formula is the length in inches x width x gsm / 3100. The answer will be the weight in grams.
Generally, the heavier the paper, that is the higher the GSM, the better the print quality, although other factors will play a part such as the ink and machine being used.
~ Fun Fact ~
A single pine tree can produce around 80,500 sheets of paper.
Resources
http://www.paper-paper.com/weight.html
https://www.papersizes.org/weight-of-sheets.htm
https://www.oki.com/us/printing/support/understanding-paper-weight/index.html