Unit Definition (block [Midwest 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 many midwestern USA cities is about 1/16 mile or 100 meters.
Unit Definition (t'sun) The t'sun is a Chinese unit of distance equal to 0.1 ch'ih or about 1.41 inches (3.58 centimeters).
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Length/Distance 
Convert from block [Midwest U.S.] to t'sun
