Efficiently tell my height in the Underworld

I'm preparing to battle the Wall of Flesh, but am unable to tell my height in Underworld easily without the possible need of counting blocks.

So, is there a more efficient way of telling my height in the Underworld(And possibly anywhere else) than counting blocks?

1 Answer

Assuming by "height" you meant "depth", i.e your vertical position in the world, there are two items that show depth:

• Depth Meter - As of version 1.2 found as a rare drop from Cave Bats (bugged and doesn't show depth when equipped in mobile version, according to gamepedia and wikia)
• GPS - crafted with Depth Meter, Compass and a Gold Watch at Tinkerer's Workshop in Hard Mode