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Pitching ERA Calculator

The pitching ERA calculator helps calculate a pitcher's Earned Run Average from one outing, a tournament, or a full season.

Single outing

Enter earned runs and IP from one appearance. Short relief outings can produce large swings because the workload is small.

Season totals

For season ERA, add every earned run and every inning pitched first. Then calculate once from the totals.

Avoid averaging ERAs

Do not average individual game ERA values. A two-inning outing and an eight-inning outing should not carry equal weight.

Use the calculator

Open the ERA calculator and enter the pitcher's total earned runs, IP, and extra outs.