Batting Average Calculator
Our baseball calculator computes batting average instantly. Get accurate stats with historical comparisons and benchmarks.
Batting Average Calculator
Calculator
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Formula: BA = Hits / At-Bats | OBP = (H+BB+HBP) / (AB+BB+HBP+SF) | SLG = Total Bases / AB
Additional inputs: Triples (3B), Home Runs (HR).
Worked example — BA = .300 | OBP = .382 | SLG = .531 | OPS = .913 (Elite)
Formula
BA = Hits / At-Bats | OBP = (H+BB+HBP) / (AB+BB+HBP+SF) | SLG = Total Bases / AB
Batting average divides total hits by at-bats. On-base percentage accounts for walks and hit-by-pitches. Slugging percentage weights extra-base hits by their base value. OPS combines OBP and SLG for a comprehensive offensive metric.
Worked Examples
Example 1: Season Performance Evaluation
Problem:A player has 162 hits in 540 at-bats, with 25 doubles, 5 triples, 30 home runs, and 102 singles. They also had 70 walks, 5 HBP, and 6 sacrifice flies. Calculate their batting statistics.
Solution:BA = 162 / 540 = .300 Total Bases = 102(1) + 25(2) + 5(3) + 30(4) = 102 + 50 + 15 + 120 = 287 SLG = 287 / 540 = .531 OBP = (162 + 70 + 5) / (540 + 70 + 5 + 6) = 237 / 621 = .382 OPS = .382 + .531 = .913
Result:BA = .300 | OBP = .382 | SLG = .531 | OPS = .913 (Elite)
Example 2: Comparing Two Hitters
Problem:Player A has 135 hits in 500 at-bats (all singles). Player B has 120 hits in 500 at-bats (60 singles, 25 doubles, 5 triples, 30 home runs). Who is the better offensive contributor?
Solution:Player A: BA = .270, TB = 135, SLG = .270 Player B: BA = .240, TB = 60 + 50 + 15 + 120 = 245, SLG = .490 Player A OPS ≈ .270 + OBP | Player B OPS ≈ .490 + OBP Despite lower BA, Player B produces far more total bases.
Result:Player B (SLG .490) is the stronger offensive contributor despite a lower BA (.240 vs .270)
Frequently Asked Questions
What is batting average and how is it calculated?
Batting average (BA or AVG) is one of the oldest and most widely recognized statistics in baseball. It is calculated by dividing the total number of base hits by the total number of official at-bats. The formula is simply BA = Hits / At-Bats. An at-bat does not include walks, hit-by-pitches, sacrifices, or obstruction calls. A batting average of .300 or higher is considered excellent in Major League Baseball, meaning the batter gets a hit roughly 3 out of every 10 at-bats. The statistic has been used since the 1870s and remains a fundamental measure of a hitter's ability to make contact and reach base safely via a hit.
What is considered a good batting average in MLB?
In Major League Baseball, a batting average of .300 or above is considered excellent and typically places a player among the league leaders. An average between .270 and .299 is above average and indicates a solid, productive hitter. The league-wide average usually hovers around .250 to .260 in modern baseball. An average between .220 and .249 is below average but still acceptable for players who contribute in other ways such as power hitting or exceptional defense. Below .200 is often referred to as the 'Mendoza Line,' named after Mario Mendoza, and typically indicates a struggling hitter who may face roster cuts unless they provide outstanding value in other areas of the game.
What is the difference between batting average and on-base percentage?
While batting average only counts hits divided by at-bats, on-base percentage (OBP) measures how frequently a batter reaches base by any means. The OBP formula is (Hits + Walks + Hit-by-Pitch) / (At-Bats + Walks + Hit-by-Pitch + Sacrifice Flies). This makes OBP a more comprehensive statistic because it rewards batters who draw walks and get hit by pitches, both of which contribute to not making outs. Many modern analysts consider OBP more valuable than batting average because it better correlates with scoring runs. A player with a .250 batting average but a .380 OBP is often more valuable than one hitting .290 with a .310 OBP, because getting on base by any method helps the team score.
What is OPS and why is it important?
OPS stands for On-base Plus Slugging and is calculated by adding a player's on-base percentage (OBP) to their slugging percentage (SLG). It combines a hitter's ability to reach base with their power-hitting ability into a single number. An OPS of .900 or above is considered excellent, .800 to .899 is very good, .700 to .799 is above average, and below .700 suggests a below-average offensive contributor. OPS has become one of the most popular quick-reference statistics in modern baseball analytics because it provides a more complete picture of offensive production than batting average alone. While not perfect, OPS correlates strongly with runs scored and helps evaluate a player's overall offensive impact efficiently.
How does slugging percentage differ from batting average?
Slugging percentage (SLG) measures the total number of bases a player earns per at-bat, giving more weight to extra-base hits. While batting average treats all hits equally, slugging percentage assigns values: a single equals 1, a double equals 2, a triple equals 3, and a home run equals 4. The formula is Total Bases / At-Bats. For example, a player with 2 singles and 1 home run in 10 at-bats has a batting average of .300 but a slugging percentage of .600 (6 total bases / 10 at-bats). This distinction is critical because slugging percentage better captures a hitter's power contribution. A power hitter with a .250 average but .500 slugging percentage is producing more offense per at-bat than a contact hitter batting .300 with .350 slugging.
What is the difference between a plate appearance and an at-bat?
A plate appearance covers every completed trip to the plate. An at-bat is the narrower subset used as the batting average denominator: it excludes walks, hit-by-pitches, sacrifice bunts, sacrifice flies and catcher's interference. So a hitter with 600 plate appearances, 70 walks, 5 hit-by-pitches and 6 sacrifice flies has 519 at-bats. Because those outcomes vanish from the denominator, a patient hitter who walks constantly is neither rewarded nor punished by his average.
Why doesn't reaching base on an error raise your average?
When the official scorer rules that a fielder's misplay allowed the batter to reach, the play is scored as a reach on error, not a hit. It still counts as an at-bat, so it lands in the denominator with nothing in the numerator and pulls the average down exactly as a routine groundout would. Fast runners who force rushed throws draw more of these calls than anyone, which is one reason batting average slightly undersells their offensive contribution.
Why does the OBP denominator include sacrifice flies but not sacrifice bunts?
The distinction is about intent. A sacrifice fly is a swing at a pitch that a hitter was trying to drive, so scoring convention treats it as a real opportunity that failed to reach base and keeps it in the denominator. A sacrifice bunt is a deliberate surrender of the at-bat, usually ordered from the bench, so charging it against the hitter's on-base percentage would penalise him for following instructions. Batting average excludes both, since neither is an at-bat.
Why do analysts prefer wOBA to batting average?
Batting average treats a bloop single and a home run identically and ignores walks entirely. Weighted on-base average assigns each outcome — unintentional walk, hit-by-pitch, single, double, triple, home run — a coefficient drawn from how many runs that event actually produces on average, then scales the result so it reads on the familiar on-base percentage scale. The weights are recalculated each season because run scoring shifts, which is why wOBA travels better across eras than a raw average.
How many at-bats does a batting average need before it means much?
Enough that a handful of bloopers cannot move it. Over fifty at-bats, three lucky ground balls through the infield are worth sixty points of average. Major League Baseball itself sets the bar for a batting title at 3.1 plate appearances per team game, which works out to 502 over a 162-game schedule. For in-season reads, pair the average with plate discipline and batted-ball rates, which settle far sooner than the average itself.
References
Reviewed for accuracy by Sher, Sports Science & Nutrition Specialist · Editorial policy
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