What would you like to do?

How many grains of sand are there in the world?

already exists.

Would you like to merge this question into it?

already exists as an alternate of this question.

Would you like to make it the primary and merge this question into it?

exists and is an alternate of .

According to the University of Hawaii's answer:

There are seven quintillion five quadrillion grains of sand on all the beaches of the world. That's a 75 with 17 zeros following!

"75 with 17 zeros following" (7.5x10^18) is seven quintillion, five hundred quadrillion. But what's an extra 495 quadrillion with so many variables in the equation?

Consider more possibilities...

With oceans rising and the deserts expanding, the question of grains of sand on the beach is kind of arbitrary. I think we would do better to ponder a more global picture: an estimate of all "sand" particles on the entire earth's surface, (including that which is covered by salty, briny, or fresh seas and rivers).

Of course "sand" varies by composition, but is defined by size of particle. Tough questions then arise regarding the unexplored ocean floor, which includes a lot of silt (the same composition, but different size per particle than sand). Perhaps we could correct for that based on volume of silt, (or gravel, for that matter), per grain of sand under the sea.

With massive erosion occurring due to water runoff and flooding caused by widespread deforestation, the intractability of the problem becomes as troublesome as estimating the number of stars in the expanding universe. Isn't that the analogy that captures our imagination, anyway - stars versus grains of sand?

But another answer is:

The exact number is not known.

The exact number can't be known to mere mortals. The number of grains of sand is constantly changing as rock is worn away daily into more sand and tons of sand are melted daily to make glass and other products. Then you come to the dilemma of deciding the point at which sand ground fine enough, when do you start to call it dust.
90 people found this useful
Thanks for the feedback!

How many grains of sand are in an hourglass?

That will strongly depend on both the cross-sectional area of the regulating orifice, and the duration of the time period that the device is designed to delineate.

How many grains of sand are there in Florida?

This is an un-answerable question due to the fact that the number of grains of sand is constantly changing and we can not keep up with it. But I can tell you that Florida has

How much grains of sand are in the world?

Many beyond the imagination. Infinity. They could not even be counted. It would take around five billion lifetimes to do so!
In Geology

How many grains of sand in a pund of sand?

7,008 grains= 1 pound of sand. Answer: The term "sand" can be assigned to wide range of particles. Studies indicate that mid-sized sands weigh 0.67 - 23 mg per grain. This
In Geology

How many quarks in a grain of sand?

There are 3 quarks in each neutron. There are 12 neutrons in each proton. There is 1 proton in each atom. There is 36 quarks in each atom. There are about 27 million atoms in