Free · Baseball calculators ⚾

ERA from Whole Innings and Extra Outs

Calculate earned-run average with separate whole innings and extra outs, plus an adjustable game length for nine- or seven-inning normalization.

Calculator inputs

Loading calculator…

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.

Three earned runs over six innings and two outs give a nine-inning ERA of 4.05.

ERA = earned runs × game innings / (whole innings + extra outs / 3)

Enter these known values and leave the other values blank.

Enter whole innings and remaining outs separately. A scorebook entry of 6.2 means six innings and two outs, not 6.2 decimal innings.
Recorded earned runs and complete innings are nonnegative whole numbers; remaining outs range from zero to two. At least one out must have been recorded.
Game length is a positive whole number. Nine is the default; select the normalization appropriate to your competition.
Zero earned runs yield ERA zero. Zero ERA cannot uniquely determine an unknown innings total when runs are also zero.

Yes. Enter zero complete innings and one or two additional outs.

Bookify separates whole innings from zero, one or two extra outs and accepts a positive partial inning with zero complete innings.