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Fielding Percentage from Putouts, Assists & Errors

Calculate the fielding fraction from recorded putouts, assists and errors, with reversible inputs and a guard against zero chances.

Calculator inputs

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Enter the known values in the units shown. Results update as you type.
Where results are editable, change one to solve backwards. Lock a value to hold it fixed.
Use the worked example to check the method. Reset restores the starting fields.

Inputs and results stay in this browser tab. Bookify does not upload or store the values you enter.

With 80 putouts, 15 assists and 5 errors, the fielding fraction is 0.950, equivalent to 95%.

Fielding fraction = (putouts + assists) / (putouts + assists + errors)

Enter these known values and leave the other values blank.

Counts are nonnegative whole numbers. At least one recorded chance is required.
The displayed output is a decimal fraction: 0.950 means 95%.
These counts describe recorded fielding outcomes. The ratio alone does not measure range or compare different defensive opportunities.
An inverse may be nonunique at zero or one. For example, zero errors and a fraction of one do not determine an unknown number of putouts.

The ratio is undefined because its denominator is zero; enter at least one chance.

Bookify requires whole fielding counts, at least one chance, and a fraction between zero and one.