Batting Average Calculator: Formula and Examples

To calculate a batting average, divide a baseball or softball player’s hits by their official at-bats. Enter those two numbers in the calculator below to get the average as a decimal, rounded to three places.

Formula

Batting average = hits ÷ at-bats, or AVG = H / AB.

• H is the number of hits, a count.
• AB is the number of official at-bats, a count.
• AVG is the resulting batting average, conventionally written as a decimal to three places.

The calculator also shows the same ratio as a percentage: batting average × 100. Baseball statistics normally use the decimal form, so a percentage is an optional way to make the proportion easier to interpret. Both inputs must be nonnegative whole-number counts, and at-bats must be greater than zero for the formula to produce a result.

Worked Example

Using the calculator’s default values—40 hits and 120 at-bats:

1. Divide hits by at-bats: 40 ÷ 120 = 0.333333…
2. Round to three decimal places: batting average = .333.
3. For the optional percentage, multiply by 100: 0.333333… × 100 = 33.3% when rounded to one decimal place.

Baseball convention generally omits the leading zero when displaying an average, so .333 means 0.333. The percentage is a mathematical equivalent, not the usual way a player’s batting average is reported.

What Batting Average Measures

Batting average describes how often a batter gets a hit per official at-bat. It is a rate, not a count of hits: a player with 40 hits in 120 at-bats and one with 100 hits in 300 at-bats both have a .333 average. The second player has more hits, but the same hit-to-at-bat proportion.

The statistic focuses on whether an at-bat ended in a hit. It does not measure how many bases a batter gained, whether a plate appearance produced a walk, or the overall value of a player’s offensive contributions. A single and a home run each count as one hit in the numerator, even though they have different outcomes.

Batting averages are usually displayed to three decimal places. An average of .300 corresponds to a hit in 30% of official at-bats; it does not mean the batter gets a hit in exactly 30% of every set of ten chances. The decimal summarizes results over the full sample.

What Counts as an At-Bat

The denominator is not the same as plate appearances. A plate appearance is a completed turn at bat, while an at-bat is a narrower statistical category. Some plate appearances do not count as at-bats, including walks, hit-by-pitches, sacrifices, and certain cases where a batter reaches base because of an error or a fielder’s choice. The precise scoring decision matters, so use the at-bat total recorded in the player’s official statistics rather than counting every trip to the plate.

Hits include singles, doubles, triples, and home runs. Each counts as one hit for batting average. Reaching base on a walk or an error does not become a hit merely because the batter reached safely.

This distinction explains why dividing hits by plate appearances gives a different rate. For batting average, use official at-bats. If you want a statistic that includes walks and other ways of reaching base, on-base percentage is a separate measure with its own formula.

How to Use and Interpret the Calculator

• Find the player’s hit total and official at-bat total for the same period, such as one game, a season, or a career.
• Enter both counts as whole numbers. Do not enter plate appearances in place of at-bats.
• Read the decimal result as the share of at-bats that resulted in hits. For example, .250 represents one hit per four at-bats on average.
• Compare players over the same competition level and time span when possible. A short stretch of games can produce a very different average from a full season.

The formula works for a single player, a team total, or any defined set of at-bats, provided the hits and at-bats refer to the same group and period. For multiple players, add their hits and add their at-bats, then divide the combined totals. Do not simply average the players’ displayed averages unless their at-bat totals are equal; that can give each player’s rate the same weight even when their opportunities differ.

Common Errors and Limitations

A frequent mistake is using plate appearances instead of at-bats. Another is mixing totals from different time periods—for example, a season’s hits divided by a career at-bat total. Either error changes the result and makes it unsuitable for the intended comparison.

Rounding can also create small differences. Keep the original hit and at-bat counts for calculations, and round only the final display. If a source reports .333, that may be a rounded display of a slightly different underlying fraction; multiplying the displayed value by a denominator may not recover the exact hit count.

A batting average cannot be calculated when at-bats are zero, because division by zero is undefined. A player with no official at-bats does not have a meaningful batting average for that sample; do not treat the result as .000. The statistic also has a limited scope: it treats every hit equally and does not account for walks, power, or the full value of reaching base. Use it as one descriptive measure, not as a complete assessment of hitting.

Frequently Asked Questions

What is a good batting average?
There is no single cutoff that applies to every era, league, or level of play. Compare the average with the relevant competition and season, and remember that batting average alone does not describe all aspects of hitting.

Do walks count as at-bats?
No. A walk is a plate appearance but is not an official at-bat, so it does not increase the denominator in the batting-average formula.

Does a home run count as one hit?
Yes. A home run counts as one hit for batting average, just as a single, double, or triple does. The number of bases gained is not part of this formula.

Can batting average be written as a percentage?
Yes. Multiply the decimal by 100: .250 is equivalent to 25%. In baseball statistics, the decimal form is standard.

How do I calculate a team batting average?
Add the team’s hits and divide by its at-bats for the same period. This properly weights each player’s contribution by their number of at-bats; averaging individual averages directly may not.

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in h | Hits | - | 40 | 0
in ab | At-bats | - | 120 | 0
out avg | Batting average | - | h / ab | 3
out pct | Equivalent percentage | % | 100 * h / ab | 1