The following are links to length or distance conversion calculators and the conversion constants.
Unit of Measure
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||Angstrom is a unit of length equal to one hundred-millionth (10-8)
of a centimeter, used especially to specify radiation wavelengths.
|Astronomical units Conversions
||Mean (average) distance between the earth and the sun.
||Cable is a unit of length equal to 720 feet (220 meters) in the
United States and 608 feet (185 meters) in England
||Or centimeter, The hundredth part of a meter; a measure of
length equal to rather more than thirty-nine hundredths (0.3937) of an
|Cubits (England) Conversions
||An ancient unit of linear measure, originally equal to the
length of the forearm from the tip of the middle finger to the elbow, or
about 17 to 22 inches (43 to 56 centimeters).
||Equal to 6 feet (1.83 meters), used principally in the
measurement and specification of marine depths.
||U.S. Customary and British Imperial systems equal to 12
inches (0.3048 meter).
||The eighth part of a mile; forty rods; two hundred and
||Unit of length equal to 4 inches (10.2 centimeters),
normally used to specify the height of a horse.
||U.S. Customary and British Imperial systems, equal to 1/12
of a foot (2.54 centimeters).
||Or Kilometer, metric unit of length equal to 1,000 meters
|Light year Conversions
||The distance that light travels in a vacuum in one year,
approximately 9.46 trillion (9.46 1012)
kilometers or 5.88 trillion (5.88 1012)
||International standard unit of length, approximately
equivalent to 39.37 inches. It was redefined in 1983 as the distance
traveled by light in a vacuum in 1/299,792,458 of a second.
|Miles (Nautical) Conversions
||A unit of length used in sea and air navigation, based on
the length of one minute of arc of a great circle, especially an
international and U.S. unit equal to 1,852 meters (about 6,076 feet).
|Miles (Statute) Conversions
||Equal to 5,280 feet or 1,760 yards (1,609 meters), used in
the United States and other English-speaking countries.
||Or Millimeter, equal to one thousandth (10-3)
of a meter, or 0.0394 inch
|Points (printing) Conversions
||Equal to 0.01384 inch, or approximately 1/72
of an inch.
||Equal to 5.5 yards or 16.5 feet (5.03 meters). Also called a "Pole".
||Distance from the tip of the thumb to the tip of the little
finger when the hand is fully extended, formerly used as a unit of measure
equal to about nine inches (23 centimeters).
||U.S. Customary System and the British Imperial System, equal
to 3 feet, or 36 inches (0.9144 meter).