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Dave
Dave asked in SportsBaseball · 1 decade ago

How do you come up with ERA's?

4 Answers

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  • crazydave
    Lv 7
    1 decade ago
    Favorite Answer

    It's the number of earned runs mulitiplied by 9 then divided by the number of innings pitched.

  • Patrick L
    Lv 4
    1 decade ago

    number of earned runs allowed times 9 divided by number of innings pitched. This does not include unearned runs.

    If a pitcher gives up 2 earned runs in 8 innings of work it's 2 times 9 (18) divided by 8 the answer would be 2.25

  • 18 gibbs 20
    Lv 7
    1 decade ago

    Earned runs allowed times nine divided by innings pitched

  • Tara ♥s Brian McCann
    Lv 4
    1 decade ago

    Simple;

    you average the number of earned runs per 9 innings.

    Hence the name: EARNED RUN AVERAGE

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