Map unit

The coordinates and dimensions of objects in Doom levels are generally described by integer values between -32768 and +32767. The unit length is often called a map unit (or simply, unit). Each unit is proportional to 1 pixel of a texture or sprite.

It is difficult to translate the size of a Doom map unit into a real-world unit, since the dimensions of various objects in the game are inconsistent. Very roughly, one could attempt to translate 32 map units as 1 meter (3.28 feet) based on the height of the Doom guy. Due to aspect ratio correction, the width of objects would be 0.75 m (2.4 ft) each 32 units. With this interpretation, the Doom guy would be 1.75 m (5.7 ft) tall and the smaller doors 2.25 m (7.3 ft) tall.

Some example dimensions in terms of Doom's map units are: