How many miles would you have to dig to the other side of the earth?

To dig to the other side of the Earth, you would need to go through the Earth's crust, mantle, outer core, and inner core, totaling about 7,917 miles (12,742 kilometers) from one surface point to the opposite point. However, practical digging is not feasible due to extreme temperatures and pressures within the Earth, as well as the presence of molten materials.