Unit Definition (block [East U.S.]) The Block is an informal unit of distance popular in the U.S. A block is the average distance between street intersections in the rectangular street grids common in most American cities. The length of a block in Eastern USA is about 1/20 mile or 80 meters.
Unit Definition (alen [Danish]) The Danish Alen (also used in Norway) is slightly longer than the Scandinavian Alen. It is just longer than two feet and more precisely equal to 62.77 centimeters (24.71 inches).
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Length/Distance 
Convert from block [East U.S.] to alen [Danish]
