What is Batting Average? Definition, Formula, and Example

What Batting Average Means

Batting average (AVG or BA) is the oldest mainstream hitting statistic in baseball. It answers a single question: of the times a batter put a ball in play or struck out in a true at-bat, how often did he get a hit? A .300 average means three hits per ten at-bats — the traditional benchmark for an excellent hitter. A .250 average is roughly league average, and anything under .200 is the dreaded Mendoza Line. The number is always written as a three-digit decimal and read aloud without the decimal point: ".314" is "three-fourteen."

How Batting Average Is Calculated

The formula is straightforward:

AVG = Hits ÷ At-Bats

The subtlety lives in the denominator. An "at-bat" is not the same as a plate appearance. At-bats exclude walks, hit-by-pitches, sacrifice flies, sacrifice bunts, and catcher's interference. So a hitter who walks four times and singles once in five trips to the plate finishes 1-for-1 (a 1.000 average that day), not 1-for-5. This is exactly why batting average is a poor measure of total offensive value — it ignores the most valuable non-hit outcome, the walk.

Reaching base on an error counts as an at-bat with no hit, so an error actively lowers a batter's average rather than helping it.

Worked Example

In 2024, Luis Arraez won his third consecutive batting title at .314, collecting roughly 200 hits in about 636 at-bats: 200 ÷ 636 = .3145, which rounds to .314. Compare that to the career and single-season extremes. Ty Cobb holds the highest career average ever at .366. Ted Williams hit .406 in 1941 and remains the last player to cross .400 over a full season — no one in the 80+ seasons since has matched it, underscoring how hard sustained contact at that rate is.

Why Batting Average Matters

Batting average still drives batting-title races, Hall of Fame narratives, and casual fan conversation. In fantasy baseball, AVG is one of the standard five rotisserie hitting categories, so roster construction often hinges on contact-first hitters who protect average. Front offices, however, lean far more heavily on on-base percentage, slugging percentage, and wOBA, which credit walks and weight extra-base hits properly.

Limitations and Common Misconceptions

Batting average's biggest flaw is that it treats a single and a home run identically — both are simply "one hit." It also ignores walks entirely, so a disciplined hitter with a .260 average and a .380 on-base percentage can be far more productive than a free-swinger hitting .290 with a .300 OBP. Average is also luck-sensitive in small samples: BABIP fluctuation can swing a hitter's average 30 points over a month without any change in true skill. Finally, "batting average against" for pitchers is a separate stat — don't confuse a hitter's AVG with the rate at which a pitcher allows hits.

In Legends Deck

Batting average feeds the contact component of every hitter card, but it never stands alone. Legends Deck pairs AVG with on-base and slugging inputs so that a high-average slap hitter and a high-OBP power bat generate distinct in-game profiles. When you simulate an at-bat, the contact rating governs how often you avoid an out, while separate power and discipline ratings decide what kind of hit — or walk — you actually produce.