What game length should a baseball ERA calculator use?

Most baseball ERA calculations use 9 frames.

Can relievers use this baseball ERA calculator?

Yes. Relievers and starters use the same calculation, but small samples can change quickly.

Main keyword

The baseball ERA calculator uses the standard 9-inning setting for baseball pitching lines.

Baseball ERA is normally scaled to 9 frames. That means earned runs are multiplied by 9 before being divided by IP.

Baseball scorebooks use .1 for one out and .2 for two outs. Those values should be converted to thirds before the final result.

A pitcher allows 2 earned runs over 6 frames and 1 out. The baseball ERA is 2 x 9 / 6.333 = 2.84.

Open the ERA calculator and keep game length set to 9 for baseball.