http://www.wolframalpha.com/input/?i=%28%28mass+grain+sand%2...
Answer: That's equivalent to a single grain of sand in a cube 1 mile on each side.
(You'll have to convert the final result to miles in a second step - it timed out when I tried to make it do it in one step.)
And this is including the mass of all the planets! (But not the sun.)
http://www.wolframalpha.com/input/?i=%28%28mass+grain+sand%2...
Answer: That's equivalent to a single grain of sand in a cube 1 mile on each side.
(You'll have to convert the final result to miles in a second step - it timed out when I tried to make it do it in one step.)
And this is including the mass of all the planets! (But not the sun.)