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Q: How many grains of sand are there on the earth (or on the beaches of the world). ( No Answer,   6 Comments )
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 Subject: How many grains of sand are there on the earth (or on the beaches of the world). Category: Science > Earth Sciences Asked by: neirad-ga List Price: \$2.00 Posted: 16 Mar 2006 12:08 PST Expires: 15 Apr 2006 13:08 PDT Question ID: 708064
 ```I'm simply trying to get a pretty good guess on how many grains of sand there are on the planet for illustrative purposes in a talk I'm giving. I'd like to be able to site a source of some repute. It can include any and all kinds of sand. Beaches, deserts, etc. It would be helpful to know a simple way to relate that to the average person.```
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 Subject: Re: How many grains of sand are there on the earth (or on the beaches of the world). From: ansel001-ga on 16 Mar 2006 13:41 PST
 ```Bobbie7, Did you read your own answer? First you said there were 7,500,000,000,000,000,000, or seven quintillion five quadrillion grains of sand. That should read seven quintillion five HUNDRED quadrillion. Then in 2) you said there were An estimated 1020 to 1024 grains of sand. Just a little over one thousand grains.```
 Subject: Re: How many grains of sand are there on the earth (or on the beaches of the world). From: research_help-ga on 16 Mar 2006 13:47 PST
 ```Ansel, you are being picky. Is there really a significant difference between seven quintillion and one thousand? There's always a margin of error. :-)```
 Subject: Re: How many grains of sand are there on the earth (or on the beaches of the world). From: bobbie7-ga on 16 Mar 2006 13:49 PST
 ```Ansel001, Thank you for your comment. 1020 and 1024 should read "10 to the 20th" and "10 to the 24th power." Check out the solution here: http://www.astro.utu.fi/~cflynn/sand.html And here: http://www.tufts.edu/as/physics/courses/physics5/estim_97.html```
 Subject: Re: How many grains of sand are there on the earth (or on the beaches of the world). From: bobbie7-ga on 16 Mar 2006 13:52 PST
 ```And you are correct, 7,500,000,000,000,000,000 should read seven quintillion five *hundred* quadrillion.```
 Subject: Re: How many grains of sand are there on the earth (or on the beaches of the wor From: rracecarr-ga on 17 Mar 2006 09:31 PST
 ```The question asks how many grains of sand total, not just in beaches. There is way more sand in the Sahara Desert alone than in all the beaches in the world. See question 587762.```
 Subject: Re: How many grains of sand are there on the earth (or on the beaches of the world). From: raj0301-ga on 25 Nov 2006 09:24 PST
 ```i dont think 7,500,000,000,000,000,000 will be the right answer. Because there are http://www.worldmostbeautifulbeaches.com/ these much beaches in the world. So how we can say ??? Any Justification for that```