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|  | | Length and distance
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|  | | |  This calc uses simple factors to convert between a large number of different length units. Note that most archaic units are not exactly defined.
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| | |  As a reference, the distance between atoms in a molecule is ~0.15 nm, the thickness of a human hair is ~30 microns, a double-decker bus is 8.4 m long, and the Empire State Building is 449 m high. | | ||||||
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© Andy & Steve Shipway 2008