1. What is ERA?

ERA (Earned Run Average) is a statistic in baseball that represents the average number of earned runs a pitcher allows per nine innings pitched. For 7 innings, we calculate the equivalent ERA value.

2. How Does the Calculator Work?

The calculator uses the ERA equation for 7 innings:

Where:

• \( Earned\ Runs \) — Number of earned runs allowed by the pitcher
• \( 7 \) — Number of innings pitched
• \( 9 \) — Standard number of innings for ERA calculation

Explanation: This formula scales the earned runs allowed in 7 innings to the standard 9-inning game format used for ERA calculation.

3. Importance of ERA Calculation

Details: ERA is one of the most important statistics for evaluating pitcher performance. A lower ERA indicates better pitching performance, as it shows the pitcher allows fewer runs per game.

4. Using the Calculator

Tips: Enter the number of earned runs allowed by the pitcher in 7 innings. The value must be zero or positive.

5. Frequently Asked Questions (FAQ)

Q1: What is considered a good ERA?
A: In modern baseball, an ERA below 4.00 is generally considered good, below 3.00 is excellent, and below 2.00 is exceptional.

Q2: How does ERA differ from other pitching statistics?
A: ERA focuses only on earned runs (excluding runs due to errors), making it a purer measure of pitching performance than total runs allowed.

Q3: Why calculate ERA for 7 innings specifically?
A: This calculation is useful for evaluating pitcher performance in 7-inning games, which occur in doubleheaders or some minor league games.

Q4: Are there limitations to ERA?
A: ERA doesn't account for ballpark factors, defensive support, or luck, which is why advanced metrics like FIP (Fielding Independent Pitching) are also used.

Q5: How does relief pitcher ERA differ?
A: Relief pitchers' ERA is calculated the same way, but they typically pitch fewer innings, making their ERA more volatile from game to game.