Fielding Percentage Calculator

Fielding percentage measures how reliably a defender converts the chances they reach into outs. It is the oldest defensive statistic in baseball: of all the balls a fielder got to and had a play on, what fraction did they handle cleanly without committing an error? This calculator adds up your successful plays — putouts and assists — and divides by your total chances.

The Fielding Percentage Formula

• Putout (PO): recording an out directly — catching a fly ball, stepping on a base, tagging a runner.
• Assist (A): throwing or deflecting the ball to a teammate who records the out.
• Error (E): a misplay the official scorer judges should have resulted in an out.

The sum PO + A + E is the fielder's total chances. Fielding percentage is shown to three decimals, just like batting average.

Worked Example

A fielder records 250 putouts, 120 assists, and 8 errors:

• Successful plays: 250 + 120 = 370
• Total chances: 250 + 120 + 8 = 378
• FPCT: 370 / 378 = .979

A .979 fielding percentage is solid and roughly average for many infield positions.

Fielding Percentage Benchmarks

The Big Blind Spot

Fielding percentage only counts balls a fielder actually reached. A slow defender who never gets to a hard grounder is charged with nothing — no chance, no error — while a rangy fielder who gets a glove on it but bobbles is charged with an error. That is why modern defensive metrics (range factor, defensive runs saved, outs above average) supplement it by accounting for the balls a fielder gets to in the first place.

It Varies by Position

A "good" fielding percentage depends heavily on where you play. First basemen and outfielders routinely post marks above .990 because most of their chances are routine catches, while shortstops and third basemen handle harder, more rushed throws and sit several points lower. Catchers and pitchers have their own ranges. Always compare a fielder to others at the same position.

Putouts vs Assists by Position

Outfielders and first basemen accumulate putouts (catching the ball for the out), while middle infielders rack up assists (throwing to a teammate). Both count identically in fielding percentage, so the split tells you about a player's role rather than their reliability — the formula simply rewards handling whatever chances arrive cleanly.

Note: This calculator is for educational purposes. Error judgments are made by the official scorer and can be subjective.