How many grains of sand are in the Sahara Desert?

1.  Background Story:

 I chose to do how many grains of sand are in the Sahara desert because I wanted to do one that would come out with a really big complicated number.




2.  Ask Yourself This:

I'm doing like more of a layer, like a blanket of sand over the Sahara desert so I don't have to do the volume.

how many square miles are in the Sahara desert.

 How many grains of sand are in a square foot

 How many square feet are in a square mile



3.  Helpful Hints:


how many square miles are in the Sahara desert: 3.629 million sq miles (9.4 million km²)

How many grains of sand are in a square foot: 45,000

 How many square feet are in a square mile: 27,878,400 square feet


I rounded the numbers to make them more simple. And I also didn't do the depth of the sand so there Is probably more sand then what my information would allow you to get. But for the layer of sand over the Sahara there are 4.51926632x10^16





4.  Construct a Formula:
Amount of grains of sand per square foot X how many square miles are in the Sahara X how many square miles are in the Sahara desert.