Earned Run Average Calculator
Calculate earned run average (ERA) for pitchers
Pitching Statistics
Enter pitching statistics to calculate Earned Run Average
Formula:ERA = (Earned Runs ÷ Total Innings) × Game Innings
Total Innings = Whole Innings + (Outs ÷ 3). Each out represents 1/3 of an inning.
ERA Results
Enter pitching statistics and click Calculateto see ERA.
Understanding ERA in Baseball
What is ERA?
Earned Run Average (ERA) measures how many earned runs a pitcher allows per nine innings pitched. It's one of the most important statistics for evaluating pitcher performance.
ERA Interpretation
- Under 2.00: Excellent
- 2.00-3.00: Very Good
- 3.00-4.00: Good
- 4.00-5.00: Average
- Above 5.00: Below Average
Sample Calculation
Example:Pitcher Statistics
Earned Runs: 15
Innings: 65
Outs: 2
Game Innings: 9
Calculation:
Total IP = 65 + (2/3) = 65.67
ERA = (15 ÷ 65.67) × 9
ERA = 2.06
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How to Use This Calculator
Step-by-step guide to get accurate results
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ERA Calculator: What It Is and How It Works
The ERA Calculator is a free online tool that helps calculate a pitcher’s Earned Run Average (ERA) instantly using earned runs and innings pitched. ERA measures how many earned runs a pitcher allows per nine innings — a key pitching statistic.
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How to Use the Calculator
Enter Earned Runs
Input the total earned runs allowed by the pitcher.
Enter Innings Pitched
Input the total innings pitched, including fractional innings (e.g., 6.1 = 6⅓ innings).
Click Calculate
See the ERA instantly.
Tip
Make sure inputs are accurate for precise results.
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Key Features
Instant Calculation
Get ERA in seconds.
Accurate & Reliable
Uses the standard formula: ERA = (Earned Runs ÷ Innings Pitched) × 9.
Easy-to-Use
No manual math needed.
Mobile-Friendly
Works on all devices.
Ideal for Fantasy Baseball & Analysis
Track pitcher performance easily for players, coaches, and analysts.
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Who Can Benefit
Pitchers & Coaches
Track performance per game, series, or season.
Fans & Analysts
Compare pitchers quickly.
Youth & Amateur Baseball
Simple tracking without complex calculations.
Fantasy Baseball
Evaluate pitcher value for drafts and scoring.
Scouts & Talent Evaluators
Assess consistency and effectiveness.
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Example Calculations
Example 1
3 ER ÷ 6 IP = 4.50 ERA
Example 2
72 ER ÷ 180 IP = 3.60 ERA
Example 3
5 ER ÷ 9 IP = 5.00 ERA
Example 4
20 ER ÷ 45 IP = 4.00 ERA
Frequently Asked Questions
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