How do you calculate era?
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2002 OBR Rule 10.22(e) Pitcher's earned run average, multiply the total earned runs charged against his pitching by 9, and divide the result by the total number of innings he pitched. NOTE: Earned run average shall be calculated on the basis of total innings pitched including fractional innings. EXAMPLE: 9 1/3 innings pitched and 3 earned runs is an earned run average of 2.89 (3 ER times 9 divided by 9 1/3 equals 2.89).You can also use this handy dandy online ERA calculator
http://www.chinookll.org/calculators/era...
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it is the number of earned runs allowed, per nine innings. therefore if a pither gives up 1 run in 9 innings, his era would be 1.00. if a pitcher gives up 3 runs in 3 innings, and only picthes 3 innings, his era would be 9.00, b/c statistically speaking, if he were to pitch the entire game at that rate, he would have given up 9 runs. hope that helps.How did the Twins choke so bad last year?
Multiply the total number of runs allowed by 9, divide by the number of innings pitched.You divide the number of earned runs a pitcher allows by the number of innings pitched, then multiply the result by 9.
ER (Earned Runs) X 9 / Innings pitched
Example. 30 Runs allowed, 25 Earned runs in 102 IP
25 ER X 9 = 225/102 = 2.21 ERA (2.205882)
Remember, Just use Earned runs, not all runs.
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