The answer is interesting, because it depends on where you are!
If the Earth were a perfect sphere, of course the answer would be the same everywhere. But the Earth is what we call and oblate spheroid, meaning it's flattened a bit, and is wider around the equator than around the poles. In other words, if you were to drill from the south pole to the north pole, the hole would be smaller in distance than a hole drilled between two points on the equator.
Anyway, the average radius of the Earth is 6371 km (3958 miles), with the polar radius being 6356km, and the equatorial radius being 6378km.
http://en.wikipedia.org/wiki/Earth
If you were going all the way through, you would have to double those lengths to get the answer.
Neptune is approximately 2.73 billion miles from Earth.
At the equator, it is 24,960 miles around the Earth.
How many month and miles does it take to get from earth to mars?
The distance to the center of the Earth is approximately 4,000 miles.
The radius of Earth is about 4,000 miles.
Mercury is about 48000000 miles (77300000 kilometers) from Earth at its closest
The Earth's mantle is about 1800 miles thick.
200,000,500,000 Miles
5 to 50 miles
330 cubic miles
93,000,000 miles.
60 miles