How it's calculated
ERA = (earned runs × 9) ÷ innings pitched
earned runs = runs charged to the pitcher, innings pitched = innings thrown, 9 = innings per game. ERA+ = league ERA ÷ ERA × 100.
Reference ranges
| ERA | Grade |
|---|---|
| Below 2.00 | Elite |
| 2.00-3.00 | Excellent |
| 3.00-4.00 | Solid |
| Above 5.00 | Struggling |
Common questions
How is ERA calculated?
Multiply earned runs by 9, then divide by innings pitched. It expresses earned runs allowed per nine innings.
What is ERA+?
ERA+ adjusts ERA for the league and ballpark, with 100 as average. Above 100 is better than average.