Baseball Calculators

Team

Pythagorean Expectation – estimates a team’s expected winning percentage based on runs scored and runs allowed. It uses a formula that considers the ratio of these two factors to assess performance, helping to identify teams that may be overperforming or underperforming relative to their actual win-loss record.

Batting

At Bats per Home Run (ABHR) – how many at-bats a player takes before hitting a home run. It is calculated by dividing the total at-bats by the number of home runs. A lower AB/HR indicates a player hits home runs more frequently, showcasing their power-hitting ability.
Batting Average (BA) – measures a player’s hitting performance by calculating the ratio of hits to at-bats. It’s expressed as a decimal, with higher numbers indicating better performance. A batting average of .300, for example, means the player gets a hit in 30% of their at-bats, which is considered very good in baseball.
Batting Average on Balls in Play (BABIP) – a player’s hitting success on balls that are put in play (excluding home runs, strikeouts, and walks). It calculates the ratio of hits to the total number of balls in play. A higher BABIP suggests that a player is getting more hits on their contact, while a lower BABIP might indicate bad luck or weak contact.
Walk to Strikeout Ratio (BB/K) – the number of walks a player receives to the number of strikeouts they have. A higher ratio indicates better plate discipline, meaning the player is more likely to draw walks instead of striking out. This stat helps evaluate a player’s ability to make contact and manage at-bats effectively.
Park Factor (BPF) – how a specific ballpark influences offensive and defensive performance compared to the league average. It takes into account factors like home runs, runs scored, and other statistics to determine if a park is more favorable to hitters or pitchers. A park factor above 1.0 favors hitters, while a factor below 1.0 favors pitchers.
Equivalent Average (EqA) – measures a player’s overall offensive production by combining their hitting, walking, and base-running contributions into a single number. It adjusts for league and park factors, allowing for a fair comparison across players. EqA is expressed as a number between 0 and 1, with higher values indicating better offensive performance.
Ground Ball / Fly Ball (GB/FB) – the number of ground balls a pitcher allows to the number of fly balls. Ground balls are hits that stay low to the ground, while fly balls are hit into the air. A higher ground ball ratio is often seen as favorable, as it can lead to more double plays and fewer home runs, indicating effective pitching.
Ground Outs / Fly Outs (GO/AO) – the number of ground outs to fly outs recorded by a player or pitcher. Ground outs occur when a ball hit on the ground is fielded and thrown out, while fly outs happen when a ball is caught in the air. A higher ground outs ratio suggests effective pitching that induces ground balls, which can be advantageous for defense and reducing scoring chances.
Gross Production Average (GPA) – a player’s overall offensive contributions by factoring in hits, walks, and total bases while also adjusting for runs scored. It provides a measure of a player’s ability to produce runs for their team. GPA is expressed as a number, with higher values indicating better offensive performance.
Home Runs per At Bat (HR/AB) – how frequently a player hits home runs relative to their total at-bats. It’s calculated by dividing the number of home runs by the number of at-bats. A lower HR/AB indicates a player is hitting home runs more often, showcasing their power-hitting ability.
Isolated Power (ISO) – measures a player’s raw power by calculating the number of extra-base hits (doubles, triples, and home runs) per at-bat. It’s determined by subtracting batting average from slugging percentage. A higher ISO indicates a player has greater power-hitting ability, as it reflects their capacity to hit for extra bases.
On Base Percentage (OBP) – how frequently a player reaches base through hits, walks, and hit by pitches. It’s calculated by dividing the total number of times a player gets on base by their total plate appearances. A higher OBP indicates a player is effective at getting on base, contributing to their team’s scoring opportunities.
On Base Plus Slugging (OBPS) – combines a player’s On-Base Percentage (OBP) and Slugging Percentage (SLG) to provide a comprehensive measure of their offensive performance. It reflects both a player’s ability to get on base and their power-hitting ability. A higher OPS indicates a more productive hitter who contributes significantly to their team’s offense.
Plate Appearances per Strikeout (PA/SO) – how many times a player comes to bat before striking out. It’s calculated by dividing the total plate appearances by the number of strikeouts. A higher PA/K ratio indicates better contact ability and discipline at the plate, suggesting the player is less likely to strike out.
Runs Created (RC) – estimates the number of runs a player contributes to their team based on their offensive performance. It combines various elements like hits, walks, and total bases to determine how effectively a player helps score runs. A higher Runs Created total indicates a greater offensive impact on the team’s scoring.
Runs Produced (RP) – the total number of runs a player contributes to their team by combining their runs scored and runs batted in (RBIs). This statistic gives a clear indication of a player’s overall offensive contribution to scoring. A higher Runs Produced total reflects greater effectiveness in helping the team score runs.
Stolen Base Percentage (SB%) – the success rate of a player when attempting to steal a base. It’s calculated by dividing the number of successful stolen bases by the total number of stolen base attempts. A higher SB% indicates a player is more effective at stealing bases, contributing to their team’s offensive strategy.
Slugging Percentage (SLG) – measures a player’s power-hitting ability by calculating the total number of bases a player records per at-bat. It factors in singles, doubles, triples, and home runs, giving more weight to extra-base hits. A higher slugging percentage indicates greater power and effectiveness in producing runs.
Total Average (TA) – assesses a player’s overall offensive contribution by considering hits, walks, and stolen bases while accounting for total at-bats. It provides a more comprehensive view of a player’s hitting ability compared to traditional stats like batting average. A higher total average indicates a more productive offensive player.
Total Bases (TB) – the number of bases a player earns through their hits. A single counts as one base, a double as two, a triple as three, and a home run as four. This statistic helps evaluate a player’s power-hitting ability and overall offensive performance, with higher totals indicating more impactful hitting.
Times on Base (TOB) – how many times a player successfully reaches base during a game. This includes hits, walks, and being hit by a pitch. It’s an important statistic that reflects a player’s ability to get on base and contribute to scoring opportunities for their team.
True Average (TAv) – gives a better idea of how well a player hits. Unlike the regular batting average, which only counts hits, True Average also includes walks and other factors. This helps show a player’s overall ability to get on base and contribute offensively more accurately.
Extrapolated Runs (XR / XRR / XRB) – estimates how many runs a player contributes to their team based on their performance. It takes into account various offensive actions like hits, walks, and extra bases to predict the number of runs a player helps generate. This metric helps provide a clearer picture of a player’s overall impact on the game’s scoring.

Fielding

Fielding Percentage (FCPT) – shows how often a defensive player successfully makes a play without errors. It’s calculated by dividing the number of successful plays (like catches and throws) by the total chances they have (including any mistakes). A higher fielding percentage means the player is more reliable and effective in the field.
Range Factor (RF) – how many defensive plays a player makes in a game. It adds up their putouts and assists and divides by the number of games they play. A higher range factor means the player is good at covering ground and making more plays on the field.
Total Chances (TC) – counts all the defensive opportunities a player has in a game. It includes putouts, assists, and errors. This stat helps show how involved a player is in the defense and how often they handle the ball.

Pitching

Batting Average Against (BAA) – how often hitters get a hit when facing a specific pitcher. It’s calculated by dividing the number of hits the pitcher allows by the total number of at-bats against them. A lower BAA means the pitcher is better at preventing hits from opposing players. Also known as Opponent’s Batting Average (OBA).
Component Earned Run Average (ERC) – breaks down a pitcher’s Earned Run Average into different parts to better understand their performance. It looks at factors like runs allowed from hits, walks, and other sources separately. This helps identify specific strengths and areas where the pitcher can improve.
Defense Independent Component ERA (DICE) – evaluates how well a pitcher performs based on factors they can control, such as strikeouts, walks, and home runs allowed. It excludes the impact of the defense behind them, providing a clearer picture of the pitcher’s true effectiveness. A lower DICE ERA indicates a more reliable and skilled pitcher.
Earned Run Average (ERA) – how many runs a pitcher allows per nine innings pitched, not counting runs caused by errors. It helps show how effective a pitcher is at preventing the other team from scoring. A lower ERA means the pitcher is performing better.
Fielding Independent Pitching (FIP) – focuses on a pitcher’s performance based on factors they can control, such as strikeouts, walks, and home runs allowed. It excludes the impact of fielders, providing a clearer assessment of a pitcher’s effectiveness. A lower FIP indicates better performance.
Ground Ball / Fly Ball (GB/FB) – measures the type of contact a pitcher allows by comparing the number of ground balls to fly balls. Ground balls are hits that stay low to the ground, while fly balls are hits that go into the air. A higher ground ball ratio is often seen as favorable, as ground balls tend to lead to more double plays and fewer home runs.
Ground Outs / Fly Outs (GO/AO) – the number of ground outs to fly outs a player or pitcher records. Ground outs are when a ball hit on the ground is fielded and thrown to get the batter out, while fly outs occur when a ball is caught in the air. A higher ground outs ratio can indicate strong ground ball pitching, which often leads to fewer runs scored.
Hits per 9 Innings (H/9) – the average number of hits a pitcher allows for every nine innings pitched. It helps evaluate a pitcher’s effectiveness in limiting opposing hitters. A lower H/9 indicates that the pitcher is doing a good job of keeping hits to a minimum.
Innings Pitched per Game (IP/GS) – the average number of innings a pitcher throws in each game they play. It helps assess a pitcher’s durability and how long they can stay effective in a game. A higher IP/G indicates that a pitcher is capable of going deeper into games without needing to be replaced.
Left on Base Percentage (LOB%) – the proportion of runners that a team leaves on base at the end of an inning. It indicates how effective a team is at converting scoring opportunities. A lower LOB% suggests that a team is not capitalizing on chances to score, while a higher percentage shows better efficiency in driving in runs.
Opponents Batting Average (OBA) – how often hitters succeed against a particular pitcher. It’s calculated by dividing the number of hits allowed by the total at-bats faced. A lower OBA indicates that the pitcher is effective at preventing opposing batters from getting hits.
Power Finesse Ratio (PFR) – the number of strikeouts to walks a pitcher records. A high ratio indicates a pitcher who relies on overpowering hitters with strikeouts (power), while a lower ratio suggests a finesse pitcher who focuses on control and inducing weak contact. This statistic helps evaluate a pitcher’s style and effectiveness on the mound.
Run Average (RA) – the average number of runs a team allows per game. It is calculated by dividing the total runs allowed by the number of games played. A lower run average indicates a stronger defense and pitching, while a higher run average suggests more difficulty in preventing runs.
Save Percentage (SV%) – measures the effectiveness of a relief pitcher in converting save opportunities. It’s calculated by dividing the number of successful saves by the total save opportunities. A higher save percentage indicates that the pitcher is reliable in closing out games and preserving leads.
Strike to Walk Ratio (K/BB) – the number of strikeouts a pitcher records to the number of walks they allow. A higher ratio indicates that the pitcher is effective at getting hitters out while maintaining good control, as they strike out more batters than they walk. This stat helps evaluate a pitcher’s ability to dominate hitters while minimizing free passes.
Walks and Hits per Inning Pitched (WHIP) – the average number of walks and hits a pitcher allows for each inning they pitch. It’s calculated by adding the number of walks and hits allowed and dividing by the total innings pitched. A lower WHIP indicates that a pitcher is effective at limiting base runners, while a higher WHIP suggests more trouble in preventing hitters from reaching base.
Walks per 9 innings (BB/9) – the average number of walks a pitcher allows for every nine innings pitched. It helps evaluate a pitcher’s control and ability to avoid giving free passes to hitters. A lower BB/9 indicates better control, while a higher number suggests that the pitcher may struggle with accuracy.