Baseball ERA Calculator
Calculate Earned Run Average (ERA) - the average number of earned runs a pitcher allows per nine innings
About ERA
ERA (Earned Run Average) measures the average number of earned runs a pitcher allows per nine innings pitched. The formula is: ERA = (Earned Runs / Innings Pitched) x 9. Lower ERA indicates better pitching performance.
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Editorial Note
MyCalcBuddy Editorial Team
This page is maintained as an educational calculator reference.
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Formula Source: Standard Mathematical References
by Various
🔄Last reviewed: May 2026
✓Formula checks are based on standard references and internal QA review.