ERA Calculator
Calculate a pitcher's earned run average (ERA) from earned runs and innings pitched, using baseball innings notation.
ERA
1.12
- Innings pitched
- 304⅔
- Outs recorded
- 914
- Earned runs per inning
- 0.1247
Show the work
Innings as a number: .1 = ⅓, .2 = ⅔
IP = whole innings + outs ÷ 3
304 + 2 ÷ 3 = 304.6666667
ERA, to 2 decimals
ERA = 9 × earned runs ÷ innings
9 × 38 ÷ 304.6666667 = 1.12
How it works
ERA = 9 × earned runs ÷ innings pitched (MLB glossary); 6.1 innings = 6⅓
Questions
- How does the ERA calculator work?
- ERA = 9 × earned runs ÷ innings pitched (MLB glossary); 6.1 innings = 6⅓.
- What do I need to enter?
- Earned runs, Innings pitched. Optional fields can be left blank.
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