How do I calculate a pitcher's ERA?
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It is the number of runs a pitcher gives up for every 9 innings pitched. We'll use an easy example to start with. A pitcher records 1 out and gives up 1 run. To turn 1 out into 9 innings, you multiply it by 27. You do the same thing with the runs to get an ERA of 27.00. Now lets use a tougher example. This year Jake Peavy has pitched 39 1/3 innings. This equals out to 118 outs. To change that into a nine inning game we divide by 27 to get 4.37. He has given up 9 runs this season so we then divide this by the 4.37 we got before to come up with his ERA of 2.06. In short take the number of earned runs (not runs, but EARNED RUNS!!) and divide this by the number of outs divided by 27.ERA= Earned runs/(Innings Pitched/9)
or my preferred method
ERA= Earned runs/(Outs recorded/27)
Hope that wasn't too confusing.
(9 x earned runs allowed) divided by total innning pitched.
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Runs allowed divided by Innings pitched, times 9= ERAWhats the record for strikeouts in a game by a n.l. rookie?
Earned runs allowed divided by ninnings pitched x 9.More Questions & Answers...