12 inches (in.) = 1 foot (ft.)
3 feet = 1 yard (yd.)
5-1/2 yards, or 16-1/2 feet = 1 rod (rd.)
320 rods, or 5280 feet = 1 mile (mi.)
1760 yards = 1 mile
mi. rd. yd. ft. in.
1 = 320 = 1760 = 5280 = 63360
Architects, carpenters, and mechanics frequently write ′ for foot, and
′′ for inch. Thus 8′ 7′′ means 8 feet 7 inches.
Other measures of length are:
1 hand = 4 in. Used in measuring the height of horses.
1 fathom = 6 ft. Used in measuring depths at sea.
1 knot, nautical or geographical mile = 1.1526-2/3 miles or 6086 feet.
The knot is used in measuring distances at sea. It is equivalent to 1
minute of longitude at the equator.