# How many grains of sand are there in the world?

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Nose-in-the-Newsposted 5 years ago

How many grains of sand are there in the world?

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FatFreddysCatposted 5 years ago

Somewhere between "a whole bunch" and "a @#\$% load"

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Nose-in-the-Newsposted 5 years agoin reply to this

This question has been posted in physics and I was after an actual calculation.

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Wakerraposted 5 years ago

Without number, is all I know.  Somewhere it says something about if you could count the grains of sand, there are that many worlds in the universe.  If you wanted to try and number it, you'd have to figure about how much volume all the beaches have, and add them together, then take a reasonable number of volume and fill it with sand.  Count the sand to get an approximate for that volume, and divide that into the total volume of all the beaches.  Then you'd have your number

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Nose-in-the-Newsposted 5 years agoin reply to this

Great attempt at an answer. Thank you. I will post an answer to this later.

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Nose-in-the-Newsposted 5 years ago

I know I am answering my own question, but I have some of my own ideas for this one.

In recent years, geologists have made a serious attempt at estimating the number of grains of sand. They made an estimate of the total volume of sand in all of the world's sedimentary rocks, beaches and deserts. They calculated that there are 147 million cubic kilometres of sand, and by making an assumption on average grain size and packing, they came to a number of 875 trillion trillion!

Despite the above, it is impossible to know the exact number accurately.