Calculating Geometry Measurements in Python

Calculating Geometry Measurements in Python

from Esri - http://resources.esri.com/help/9.3/arcgisdesktop/com/gp_toolref/data_management_tools/calculate_field_data_management_.htm

All below from Esri:

Python expressions can use the geometry Area and Length properties with an areal or linear unit to convert the value to a different unit of measure.

!shape.area@acres! 

Areal unit of measure keywords: Unit of measure keywords: ACRES | ARES | HECTARES | SQUARECENTIMETERS | SQUAREDECIMETERS | SQUAREINCHES | SQUAREFEET | SQUAREKILOMETERS | SQUAREMETERS | SQUAREMILES | SQUAREMILLIMETERS | SQUAREYARDS | SQUAREMAPUNITSLinear unit of measure keywords: CENTIMETERS | DECIMALDEGREES | DECIMETERS | FEET | INCHES | KILOMETERS | METERS | MILES | MILLIMETERS | NAUTICALMILES | POINTS | YARDS