Enter the home runs allowed and innings pitched into the calculator to determine the home runs per 9 innings.

Home Runs Per 9 Calculator

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Home Runs Per 9 Formula

The following formula is used to calculate the home runs per 9 innings for a given number of home runs allowed and innings pitched.

HR/9 = (HR / IP) * 9

Variables:

  • HR/9 is the home runs per 9 innings
  • HR is the home runs allowed
  • IP is the innings pitched

To calculate the home runs per 9 innings, divide the home runs allowed by the innings pitched. Multiply the result by 9 to scale it to a 9-inning game.

What is Home Runs Per 9?

Home Runs Per 9 (HR/9) is a baseball statistic that measures the average number of home runs a pitcher allows per nine innings pitched. This metric is useful for evaluating a pitcher’s susceptibility to giving up home runs and is often used in conjunction with other pitching statistics to assess overall performance. A lower HR/9 indicates better performance in preventing home runs.

How to Calculate Home Runs Per 9?

The following steps outline how to calculate the Home Runs Per 9.


  1. First, determine the number of home runs allowed (HR).
  2. Next, determine the number of innings pitched (IP).
  3. Next, calculate the home runs per 9 innings using the formula HR/9 = (HR / IP) * 9.
  4. Finally, calculate the Home Runs Per 9.
  5. After inserting the values and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

Home Runs Allowed (HR) = 10

Innings Pitched (IP) = 90