Updated on May 19th, 2025

ERA Calculator

Created By Jehan Wadia


Earned Run Average (ERA)
4.50

What Is ERA

ERA stands for Earned Run Average. It is a key pitching stat in baseball that measures how many earned runs a pitcher allows per standard game length, usually 9 innings. A lower ERA means the pitcher is more effective at preventing scoring.

The formula is simple: ERA = (Earned Runs × Game Innings) ÷ Innings Pitched. For example, if a pitcher gives up 3 earned runs over 6 innings in a 9-inning game, their ERA would be 4.50.

ERA helps coaches, analysts, and fans evaluate a pitcher's performance over time, independent of team defense or scoring support.

What Is an ERA Calculator

An ERA calculator is a quick tool for determining a pitcher's earned run average based on their stats in a game or season. Rather than doing the math yourself, you simply enter earned runs, innings pitched, and the number of innings in a standard game—usually 9 for professional baseball.

This tool is perfect for:

Whether you're a coach, player, or fan, this tool makes ERA tracking fast and accurate.

How To Use the Infinity Calculator ERA Calculator

Step 1: Enter Pitching Stats

Step 2: Press “Calculate”

Step 3: View Your ERA

This ERA calculator works for single games, full seasons, or custom pitching scenarios. It’s a fast way to understand pitcher efficiency and performance at every level of baseball.