How far is the pitching mound from home plate?
60 FEET 6 INCHES In Major League Baseball, a regulation mound is 18 feet (5.5 m) in diameter, with the center 59 feet (18.0 m) from the rear point of home plate, on the line between home plate and second base. The front edge of the pitcher’s plate or rubber is 18 inches (45.7 cm) behind the center of the mound, making the front edge’s midpoint 60 feet 6 inches (18.4 m) from the rear point of home plate.
I imagine it gets no more correct than this. “The pitchers plate shall be a rectangular slab of whitened rubber, 24 inches by 6 inches. It shall be set in the ground as shown in Diagrams 1 and 2, so that the distance between the pitchers plate and home base (the rear point of home plate) shall be 60 feet, 6 inches.” http://mlb.mlb.com/mlb/official_info/official_rules/objectives_1.