ERA Calculator
Calculate ERA, WHIP, K/9, and advanced pitching statistics for baseball analysis. Professional pitcher performance evaluation with detailed ratings and comparisons.
Example Pitcher Profiles
Pitching Statistics
Required Stats
Additional Stats
Optional Stats
Understanding ERA
What is ERA?
Earned Run Average measures how many earned runs a pitcher allows per 9 innings pitched.
Formula:
ERA = (Earned Runs × 9) ÷ Innings Pitched
What's a Good ERA?
• Elite: Under 2.50
• Excellent: 2.50-3.49
• Good: 3.50-3.99
• Average: 4.00-4.49
Context Matters:
League averages vary by era, level of play, and ballpark factors.
Advanced Metrics
WHIP:
Walks + Hits per Inning Pitched. Measures baserunners allowed. Lower is better.
K/9:
Strikeouts per 9 innings. Measures dominance and swing-and-miss stuff.
K/BB Ratio:
Strikeouts to walks ratio. Shows control and command. Above 3.0 is good.
Quality Start:
6+ innings pitched with 3 or fewer earned runs. Measures consistency.