Batting Average Calculator

Batting Average Formula and How to Calculate BA

This batting average calculator computes BA and OBP from your hits, at-bats, walks, and more — the oldest and most recognizable offensive statistics in baseball.

BA = Hits ÷ At-Bats

A player with 45 hits in 150 at-bats has a batting average of 45 ÷ 150 = .300. Batting average is always expressed as a three-digit decimal — the leading zero is dropped by convention, so .300 is spoken as "three hundred."

Important: walks, hit-by-pitches, sacrifice bunts, and sacrifice flies do not count as at-bats. These plate appearances are excluded from both the numerator and denominator of BA. This is why a batter who walks frequently can have a higher OBP than their batting average alone would suggest.

What Is a Good Batting Average?

Batting average benchmarks in Major League Baseball have been relatively stable over the past 30 years, though the designated hitter era has slightly elevated averages for the American League:

• .300 and above — Elite: The informal gold standard for hitters. A .300 season earns All-Star consideration and signals an elite contact hitter. Fewer than 10–15 players hit .300 or above in a typical MLB season.
• .270–.299 — Good: Above-average for an everyday starter. Most full-time regulars cluster in this range over a full season.
• .240–.269 — Average: Near league average. Functional for a starting hitter, especially one contributing extra-base power or strong defense.
• Below .240 — Below Average: Generally replacement-level for contact-oriented hitters. Power hitters with high home run rates remain valuable below .240, but contact hitters at this level typically struggle to hold roster spots.

League-wide batting averages have trended downward as strikeout rates increase. The MLB average in 2023 was approximately .248 — historically low, reflecting the modern emphasis on power over contact.

On-Base Percentage: A Better Measure of Offensive Value

On-Base Percentage (OBP) extends batting average by crediting a hitter for all the ways they reach base — not just hits. The formula is:

OBP = (Hits + Walks + Hit-by-Pitches) ÷ (At-Bats + Walks + Hit-by-Pitches + Sacrifice Flies)

A batter who hits .265 but draws 80 walks per season can easily post a .380 OBP — far more valuable to a lineup than a free-swinger hitting .290 with only 20 walks. OBP has a stronger correlation with runs scored than batting average alone, which is why front offices prioritize it in player evaluation.

OBP benchmarks in MLB:

• .400+ — Elite: Top 5–10 hitters in the league. Players like Bryce Harper and Juan Soto regularly post OBPs in this range.
• .360–.399 — Very Good: Above-average plate discipline. A strong attribute for any everyday hitter.
• .320–.359 — Average: Near league-average OBP for full-time starters.
• Below .320 — Below Average: Limited plate discipline. Hitters in this range typically need exceptional power or defense to justify a roster spot.

BA vs. OBP: Which Stat Matters More?

For decades, batting average was the primary measure of a hitter's effectiveness. The Moneyball era (early 2000s Oakland A's) popularized OBP as a more accurate predictor of offensive output. Today, most teams use a combination of metrics:

• BA tells you how often a batter gets a hit when they put the ball in play. It's intuitive and easy to compare across eras.
• OBP tells you how often a batter reaches base by any means. It's a better proxy for run-creation potential.
• OPS (OBP + SLG) combines on-base ability with power by adding OBP and Slugging Percentage. An OPS above .800 is above average; above .900 is very good; above 1.000 is elite.
• wOBA (weighted On-Base Average) weights each type of on-base event by its run value, giving a single number that best captures offensive contribution per plate appearance.

For quick comparisons — especially at the youth and high school level where advanced metrics aren't always tracked — batting average remains a useful and accessible starting point. Use the ERA calculator to track the pitching side of the same game.

Batting Average at Every Level of Baseball

The same formula applies across all levels, but the expected averages shift based on the talent level and offensive environment:

• Little League (ages 9–12): Averages are highly variable due to walks, errors, and pitch quality. Top hitters in competitive leagues often bat .400–.500 or above in small sample sizes.
• High school varsity: Above .350 is excellent; .300–.350 is strong; .250–.300 is competitive for a starter. Recruiting-level prospects typically hit above .350 with pop.
• NCAA Division I: Everyday starters cluster around .270–.310. An average at or above .320 draws significant pro scouting interest. The best hitters in power conferences (SEC, ACC, Big 12) often lead the country at .370–.400+.
• Minor Leagues: Batting averages typically decline at each level as pitching quality improves. A .280 average in Triple-A is an excellent sign for MLB readiness.
• MLB: League average has been approximately .248–.255 in recent seasons. A .300 average remains the gold standard benchmark.

Always compare a hitter's average to their peers at the same level and in the same competitive context. A .300 average in a weak conference carries less signal than a .290 average in a top-five college baseball program. Many competitive players track nutrition alongside their stats — our macro calculator can help you dial in your diet for peak on-field performance.

How Sample Size Affects Batting Average

Batting average is highly unstable in small samples. A player who goes 6-for-20 over a week has a .300 average for that stretch — but that's only 20 at-bats, far too few to draw conclusions about true talent. Key sample size thresholds to keep in mind:

• Fewer than 50 at-bats: Almost entirely noise. Hot and cold streaks of 1–3 weeks produce averages that vary 80+ points above or below a player's true level.
• 50–150 at-bats: Signal starts to emerge, but a 30–40 point variance above or below true talent is still plausible.
• 150–300 at-bats: Roughly half a season. Averages become meaningfully predictive, though unusual BABIP (Batting Average on Balls in Play) luck can still skew results.
• 300+ at-bats: Reliable signal. A player's batting average over 300+ at-bats is a reasonable proxy for their true contact skill, especially combined with a normal BABIP around .300.