Minecraft wiki entry for Far_Lands, associated text: Walking one block in the Nether is equal to walking eight blocks in the Overworld. Thus, by traveling through the Nether, it is possible to reach the Overworld Far Lands in just over a week. However, since the Nether is a rather dangerous dimension and many different items are required to construct a nether portal, it will take you a considerable time of trivial Minecraft play in order to obtain material and proper equipment.