Total bases is a statistic used in baseball to track the number of bases a player gains after a hit. It is a weighted sum with values of 1 for a single, 2 for a double, 3 for a triple, and 4 for a home run. Only bases attained from hits count toward this total, and reaching base by other means, such as a base on balls, or advancing further after the hit, such as when a subsequent batter gets a hit, does not increase the players total bases. Total bases are used to determine a players slugging percentage, which is total bases divided by at-bats. The total bases meaning refers to how many bases players are able to reach through hits.

To calculate total bases, the sum of singles (1 base), doubles (2 bases), triples (3 bases), and home runs (4 bases) is taken. For example, if a batter hits a single, double, and home run in a game, their total bases for that game would be 1 + 2 + 4 = 7.

Total bases are often abbreviated as TB and are denoted in box scores and other statistical summaries. The statistic is most commonly associated with individual players, although it may also be recorded for teams as a whole.