What is the fielding percentage formula?

Fielding percentage is (putouts plus assists) divided by (putouts plus assists plus errors). The numerator is the chances handled cleanly and the denominator is total chances. The result is a decimal between 0 and 1, usually shown to three places like .984.

What counts as a putout versus an assist?

A putout is credited to the fielder who physically records the out, such as catching a fly ball or stepping on a base. An assist goes to a fielder who touches the ball before the putout is made, such as the shortstop who throws to first for a groundout.

What is a good fielding percentage?

It depends heavily on position. First basemen and catchers average around .993 to .994 because their chances are easier, while third basemen sit near .961 and pitchers near .955. Compare a fielder only to others at the same position.

Can I use this for softball or youth baseball?

Yes. The formula is identical at every level of baseball and softball. Only the league-average benchmarks change, so use the displayed MLB averages as a reference point rather than a strict target for amateur play.

What is the Baseball Fielding Percentage Calculator?

Enter putouts, assists, and errors to compute fielding percentage as (PO+A) divided by (PO+A+E), then compare the result against position-specific MLB league averages for first base through pitcher. It runs free in your browser on Gera Tools, with nothing uploaded.

Baseball Fielding Percentage Calculator

Name: Baseball Fielding Percentage Calculator
Creator: Gera Tools
License: https://creativecommons.org/licenses/by/4.0/

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What fielding percentage measures

Fielding percentage is the oldest defensive statistic in baseball. It answers a simple question: of all the balls a fielder had a chance to handle, what fraction did they handle cleanly? A shortstop who turns 200 grounders into outs and boots 6 has a fielding percentage of .971. The number is easy to compute and easy to understand, which is why it has appeared on the back of baseball cards for over a century.

How it works

The formula is:

fielding % = (PO + A) / (PO + A + E)

where PO is putouts, A is assists, and E is errors. The denominator, putouts plus assists plus errors, is called total chances. Every play a fielder is involved in falls into one of those three buckets. This tool runs that division and then compares your result against the recent MLB average for the position you pick, so a .975 at shortstop reads very differently from a .975 at first base.

Worked example

For example, consider a third baseman who records 120 putouts, 210 assists, and 18 errors over a season:

total chances = 120 + 210 + 18 = 348
fielding %    = (120 + 210) / 348 = 330 / 348 ≈ .948

A .948 at third base is slightly below the MLB average for that position (around .961), but the difference of 13 errors over a full season is not catastrophic — it represents about one extra error every 27 games.

Position-by-position context

Fielding percentage should never be evaluated without knowing the position, because the difficulty and frequency of chances varies enormously:

First basemen and catchers handle the most chances per game and average fielding percentages around .993–.994. The plays are generally catch-and-hold rather than throw-and-catch.
Outfielders average around .988–.992. Errors are usually dropped fly balls; misplayed grounders are less frequently scored as errors.
Second basemen and shortstops average around .979–.984. They make the most throws under pressure and have the most opportunities for both errors and range plays.
Third basemen average around .961. The position sees hard-hit balls with little reaction time, making errors more common and the position more forgiving of a lower percentage.
Pitchers average around .955 — they have fewer chances per game and fielding a comeback grounder is an awkward athletic movement.

The big caveat: range

The biggest criticism of fielding percentage is that it only measures the chances a fielder actually reached. A slow fielder who never gets to a hard grounder is not charged an error, so a high fielding percentage can hide poor range. Range-based metrics like Defensive Runs Saved (DRS) and Outs Above Average (OAA) credit fielders for the difficulty and quantity of plays made, not just the ones cleanly handled. Use fielding percentage as a quick sanity check, then look to range metrics for the full defensive picture.