United States customary units

Reference

measured.us

Defines the United States customary units and their conversions to SI

Attributes: Human-scale units of length

Point (Unit): 1/72 inch
Pica (Unit): 1/6 inch
Inch (Unit): 1/12 foot, 25.4 millimeter
Foot (Unit): 12 inches
Yard (Unit): 3 feet
Mile (Unit): 5,280 feet

Attributes: Survey units of length

Link (Unit): 33/50 feet
SurveyFoot (Unit): 1200/3937 meters
Rod (Unit): 25 links
Chain (Unit): 4 rods
Furlong (Unit): 10 chains
StatuteMile (Unit): 8 furlongs
League (Unit): 3 statute miles

Attributes: Survey units of area and volume

Acre (Unit): 43,560 ft²
Section (Unit): 640 acres, 1 square statute mile
SurveyTownship (Unit): 36 sections, 4 square leagues
AcreFoot (Unit): a volume of 1 acre, 1 foot deep

Attributes: Nautical units of length

Fathom (Unit): 6 feet
Cable (Unit): 120 fathoms
NauticalMile (Unit): 1,852 meters