Angstroms
Astronomical units
Centimeters
Decimeters
Dekameters
Feet
Gigameters
Hectometers
Inches
Kilometers
Light years
Maximum value for units
Meters
Microinches
Microns (micrometers)
Miles
Millimeters
Mils (thousandths of an inch)
Nanometers
Parsecs
Undefined or unitless
US Survey Feet - a historical survey unit that's about 2 parts per million larger than the International Feet unit. This difference is significant only at scales used for mapping in the U.S. The US Survey Feet setting is supported only for inserting or attaching drawings starting with AutoCAD 2017-based products. Drawings opened in prior versions will treat the US Survey Feet setting as Unitless.
US Survey Inches
US Survey Miles
US Survey Yards
Yards
Enumeration of linear units used in AutoCAD drawings.
This enum defines the various units that can be used to represent linear measurements in AutoCAD drawings, including metric, imperial, and survey units.