What is the minimum distance from earth to mercury?

Mercury is an average distance of 48 million miles (77 million km) from Earth.

The distance from Mercury to the Earth varies greatly as both planets orbit the Sun. At its closest approach, Mercury is about 77 million kilometers (48 million miles) from Earth; at its furthest, about 222 million kilometers (138 million miles). As I write this (13 October 2007), the distance is nearer to the lower end of the range, as Mercury will be at inferior conjunction in just ten days' time.

Answer:

Mercury is about 57 million miles from Earth, at the closest point in its orbit.

In Astronomical Units (AU).

0.61290107 AU.

48 million miles on average