Baseball ERA Calculator
Standard ERA
ERA = (Earned Runs / Innings Pitched) x 9
ERA+ (Adjusted ERA)
ERA+ = (League ERA / Pitcher ERA) x 100
Formula
ERA = (Earned Runs / Innings Pitched) x 9
Frequently Asked Questions
What is ERA in baseball?
ERA (Earned Run Average) is the average number of earned runs a pitcher allows per nine innings pitched. It is calculated as (Earned Runs / Innings Pitched) x 9. A lower ERA indicates better pitching performance.
What is a good ERA?
In modern MLB, an ERA below 3.00 is considered excellent, 3.00-3.50 is above average, 3.50-4.00 is average, and above 4.50 is below average.
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