ERA Calculator
Enter a pitcher's earned runs and innings pitched to get their exact earned run average (ERA) — the standard measure of pitching performance. Handles baseball innings notation (.1 = one out, .2 = two outs) automatically and rates the result from elite to high.
How the ERA Calculator works
Three simple steps. No signup. No installation.
Enter earned runs
The number of earned runs charged to the pitcher (exclude unearned runs from errors).
Enter innings pitched
Use standard notation — 6.1 means 6 innings and 1 out, 6.2 means 6 innings and 2 outs.
Get the ERA
See the exact earned run average ((ER ÷ IP) × 9) plus a rating from elite to high.
What ERA really measures in baseball
Earned run average is the oldest and most widely cited measure of pitching performance, dating back to the early 20th century when relief pitching made win-loss records an unfair way to judge pitchers. ERA answers a simple question: how many earned runs does this pitcher give up per nine innings? Because it is a rate stat, it lets you compare a starter who throws 200 innings against a reliever who throws 60. The formula is ERA = (earned runs ÷ innings pitched) × 9. A sub-3.00 ERA across a full season is excellent; the all-time single-season record is Tim Keefe's 0.86 (1880), and in the modern era Bob Gibson's 1.12 (1968) stands out. ERA has limitations — it depends on the defense behind the pitcher and on official-scorer error judgments — which is why analysts also use FIP and ERA+. But for a fast, intuitive read on how a pitcher is performing, ERA remains the number everyone checks first.
Related free tools
More no-signup tools you might find useful.
Explore all free tools
29 no-signup tools — scroll a shelf and open any of them.
Generators
13
GeneratorTrust Badge Generator
Generate trust badges for your online store in seconds.
GeneratorAmbigram Generator
Create ambigram designs that read the same upside down.
GeneratorMiddle Name Generator
Generate perfect middle name ideas based on first and last name.
GeneratorFancy Text Generator
Turn plain text into dozens of cool fonts you can copy and paste anywhere.
GeneratorGlitch Text Generator
Create creepy zalgo and cursed glitch text with an adjustable intensity.
GeneratorHeart Symbol Generator
Tap to copy hearts, stars, and aesthetic text symbols for any platform.
GeneratorTiny Text Generator
Shrink your words into tiny superscript, subscript, and small-caps text.
GeneratorUpside Down Text Generator
Flip your text upside down to copy and paste anywhere.
GeneratorInvisible Text Generator
Copy invisible blank characters for empty messages, names, and bios.
GeneratorBold Text Generator
Make real bold text that stays bold when you copy and paste it.
GeneratorStrikethrough Text Generator
Cross out your text with strikethrough, slash, and underline styles.
GeneratorText Summarizer
Paste any text and get a clear AI summary with key points.
GeneratorAI Text Humanizer
Rewrite stiff or AI-sounding text so it reads naturally human.
Calculators
14
CalculatorMortgage Calculator
Calculate your monthly mortgage payment and full amortization.
CalculatorMidpoint Calculator
Find the midpoint between two coordinates with steps.
CalculatorAP Chem Score Calculator
Predict your AP Chemistry score from practice exam results.
CalculatorPool Salt Calculator
Calculate exactly how much salt your saltwater pool needs.
CalculatorSIP Calculator
Calculate your UK Share Incentive Plan tax savings.
CalculatorHalf Birthday Calculator
Find your half birthday — exactly 6 months from your birth date.
CalculatorAP Bio Score Calculator
Predict your AP Biology score from practice exam results.
CalculatorAP Calc AB Score Calculator
Predict your AP Calculus AB score from practice exam results.
CalculatorAP Psych Score Calculator
Predict your AP Psychology score from practice exam results.
CalculatorCalculator Bacalaureat
Calculează media de absolvire a examenului de bacalaureat.
CalculatorCrosswind Calculator
Calculate crosswind and headwind components for any runway.
CalculatorDunk Calculator
Find out if you can dunk — and exactly how high you need to jump.
CalculatorDOTS Calculator
Score your powerlifting total across any bodyweight.
CalculatorUma Affinity Calculator
Check breeding compatibility before you pick inherit parents.
Your full website, built by a WhatsApp chat.
Run a baseball academy, league, or sports blog? Pixie generates your website in 60 seconds — text us on WhatsApp.