What is Batting Average in Baseball
Batting average is a baseball statistic that measures how often a batter gets a hit, calculated by dividing the number of hits by the number of at-bats.
Batting average is one of the oldest and most widely recognized statistics in baseball. It measures how frequently a batter gets a base hit, expressed as a decimal number between .000 and 1.000. A batting average of .300 (30 hits per 100 at-bats) has long been considered the benchmark for an excellent hitter at the major league level.
The Formula
$$\text{Batting Average} = \frac{\text{Hits}}{\text{At-Bats}}$$
- Hits (H) — Any time the batter safely reaches base on a fair ball without an error or fielder's choice
- At-Bats (AB) — Official plate appearances that count toward the average (excludes walks, hit by pitch, sacrifice flies, and sacrifice bunts)
Examples
| Player Stat Line | Calculation | Batting Average |
|---|---|---|
| 180 hits / 600 AB | 180 ÷ 600 | .300 |
| 160 hits / 550 AB | 160 ÷ 550 | .291 |
| 50 hits / 200 AB | 50 ÷ 200 | .250 |
Batting averages are written with three decimal places and spoken as: ".300" is "batting three hundred."
What Is a Good Batting Average?
| Average | Assessment |
|---|---|
| .330+ | Elite — typically leads the league or contends for batting title |
| .300–.329 | Very good — considered an excellent hitter |
| .270–.299 | Solid — above league average |
| .250–.269 | Average — near league mean (~.248–.255 in recent MLB years) |
| .220–.249 | Below average — often only playable for defensive position |
| Below .200 | "Mendoza Line" — threshold associated with replacement-level hitting |
The Mendoza Line
The term Mendoza Line refers to the informal threshold of a .200 batting average — named after shortstop Mario Mendoza, who hovered around .200 throughout his career. Falling below the Mendoza Line is typically seen as unacceptably poor hitting at the major league level.
Limitations of Batting Average
Modern sabermetrics (advanced baseball statistics) has revealed that batting average is an incomplete measure of offensive value because:
- It doesn't account for walks, which are valuable
- It treats all hits equally — a single counts the same as a home run
- It ignores extra-base hit power
More comprehensive metrics like On-Base Percentage (OBP), Slugging Percentage (SLG), and OPS (OBP + SLG) provide a more complete picture of a batter's offensive contribution.