बेसबॉल ERA कैलकुलेटर
ERA, ERA+, WHIP, K/9, BB/9 और K/BB — पिचर के आंकड़े दर्ज कर त्वरित विश्लेषण प्राप्त करें
पिचिंग विश्लेषण परिणाम (Results)
अर्नड रन एवरेज (ERA)
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चरण-दर-चरण गणना (Calculation Steps)
त्वरित सूत्र संदर्भ (Formulas Quick Reference)
ERA
(ER ÷ IP) × 9
ERA+
100 × (lgERA ÷ ERA)
WHIP
(BB + H) ÷ IP
K/9 & BB/9
(K or BB ÷ IP) × 9
बेसबॉल में ERA क्या है?
ERA (Earned Run Average - अर्नड रन एवरेज) बेसबॉल में किसी भी पिचर की प्रभावशीलता का सबसे प्रमुख मापदंड है। यह दर्शाता है कि एक पिचर प्रति 9 इनिंग्स (पूर्ण खेल) में कितने अर्नड रन्स (अर्जित रन) देता है। अर्नड रन्स वे रन होते हैं जो विरोधी टीम ने पिचर के खिलाफ बनाए होते हैं और इनमें फील्डिंग त्रुटियों (Errors) के कारण बने रन शामिल नहीं होते हैं।
ERA की गणना का बुनियादी सूत्र इस प्रकार है:
Worked example: A pitcher throws 7.1 innings (7⅓ innings = 7.333 decimal), allowing 3 earned runs.
- Decimal IP = 7 + (1 ÷ 3) = 7.333
- ERA = (3 ÷ 7.333) × 9 = 0.4091 × 9 = 3.68
The result, 3.68, is a solidly average ERA in the modern run environment.
Innings Pitched (IP) Format
Baseball records innings pitched in a unique format: X.Y, where Y is the number of additional outs (0, 1, or 2). To convert to decimal innings, use: IP_decimal = X + (Y ÷ 3). So 6.2 IP = 6.667 decimal innings.
ERA Rating Benchmarks
| ERA Range | Rating | Description |
|---|---|---|
| < 2.50 | Elite | Cy Young-level, top 1–2% of starters |
| 2.50 – 3.50 | Excellent | All-Star caliber, ace-of-rotation quality |
| 3.50 – 4.50 | Average | Solid MLB starter, league average range |
| > 4.50 | Poor | Below average, rotation risk or bullpen arm |
What is ERA+?
ERA+ (ERA-plus) normalizes a pitcher's ERA to the league average and accounts for ballpark factors. The formula is:
An ERA+ of 100 is exactly league average. Above 100 means better than average — a pitcher with ERA+ 150 is 50% better than the league average. Below 100 means worse. This makes ERA+ a great cross-era comparison tool: Clayton Kershaw's best ERA+ was 196 (2014), meaning he was nearly twice as good as the average pitcher that season.
WHIP Explained
WHIP (Walks plus Hits per Inning Pitched) = (BB + H) ÷ IP. It measures a pitcher's ability to prevent base runners. Unlike ERA, WHIP counts all base runners allowed (including unearned situations resulting from hits/walks), giving a cleaner picture of command and contact-prevention. A WHIP below 1.00 is elite; the best single-season WHIPs in history are around 0.78–0.83.
K/9 and BB/9 Explained
K/9 (Strikeouts per 9 innings) is a rate stat for strikeout ability. Modern power starters average 9–11 K/9. BB/9 (Walks per 9 innings) measures command — elite starters are at or below 2.0 BB/9. A high K/BB ratio (K÷BB ≥ 4.0) strongly correlates with future success, as it signals a pitcher who misses bats while throwing strikes.