Convert from block [East U.S.] to thou

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 (thou)
An inch is an Imperial unit of length. Sweden also briefly had a "decimal inch" based on the metric system: see below for more.