Baseball Pitcher Earned Run Average Calculator

Calculate a baseball pitcher's Earned Run Average (ERA) based on earned runs and innings pitched. ERA measures a pitcher's effectiveness at preventing runs.

Input Parameters

Number of runs scored while the pitcher was on the mound

Innings pitched (e.g., 7.2 innings is entered as 7.2)

Calculation Results

Calculation Formula

ERA = (9 * Earned Runs) / Innings Pitched

Where:
- ERA: Earned Run Average (decimal)
- Earned Runs: Runs scored while the pitcher was on the mound
- Innings Pitched: Total innings pitched (fractional innings allowed)

ERA is calculated by scaling earned runs to a standard 9-inning game. Lower ERA values indicate better pitching performance.

Baseball Pitcher Earned Run Average Calculator Usage Guide

Learn how to use the Baseball Pitcher Earned Run Average Calculator and its working principles

How to Use This Calculator

  1. Enter the number of Earned Runs allowed by the pitcher in the first input field. Earned runs are those scored while the pitcher was on the mound, excluding runs due to errors or passed balls.
  2. Enter the total Innings Pitched in the second input field. If a pitcher pitches 7 full innings and 2/3 of an inning, enter 7.2.
  3. Click the Calculate button to compute the ERA.
  4. The result will be displayed in the ERA field, showing how many earned runs the pitcher would allow in a full 9-inning game.

Understanding ERA

The Earned Run Average (ERA) is one of the most important statistics for evaluating pitchers. It represents the number of earned runs a pitcher allows per nine innings pitched.

  • A lower ERA is better (e.g., 2.00 is better than 4.00)
  • The league average ERA typically ranges from 3.5 to 4.5
  • A pitcher with an ERA below 3.00 is considered solid
  • A pitcher with an ERA below 2.00 is considered excellent

Example Calculation

If a pitcher allows 3 earned runs over 6 innings:

ERA = (9 * 3) / 6 = 4.50

This means the pitcher would be expected to allow 4.50 earned runs per 9 innings if they maintained this performance level.