The distance from third to first is approximately 127 feet (39 m). The third baseman is assigned the number 5 in the defensive play numbering system. The term "home plate" redirects here. See Home plate for further information (disambiguation). Home plate, also known as home base in the rules, is the final base that a player must touch in order to score. From the back tip of home plate to second base, the distance across the infield is 127 feet, 3 3/8 inches.