ERA Calculator
Calculate ERA
Formula
ERA = (Earned Runs x 9) / Innings Pitched. Fractional innings: .1 = 1/3 inning, .2 = 2/3 inning.
Frequently Asked Questions
How is ERA calculated?
ERA (Earned Run Average) = (Earned Runs x 9) / Innings Pitched. It represents the average number of earned runs a pitcher allows per 9 innings.
What is a good ERA?
In MLB, an ERA below 3.00 is considered excellent, 3.00-3.50 is very good, 3.50-4.00 is above average, and 4.00-4.50 is about average. The all-time record is 1.12 by Bob Gibson in 1968.
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