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How does Stack Overflow calculate the number "impacted", for the impact figure at the top of the user page on each site?

I know there's an explanatory comment, but it's kind of general and vague.

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1 Answer 1

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The calculation is explained in the announcement for the feature:

That's how we got to the current method, which counts views on the following:

  • Questions
    • Non-deleted only
  • Answers - Views of the parent question for answers that are:
    • Non-deleted AND
    • Score > 0 AND
    • Also meets one or more of the following criteria:
      • In the top 3 answers OR
      • Is the Accepted Answer OR
      • Score at least 5 OR
      • Has at least 20% of the total vote count

See the announcement for more explanation of the rationale.

The number is approximate, not exact; it's probably heavily cached. To sanity-check this (without having to wrangle tons of data), I looked at my own profile on Health Meta, which shows:

  • Impact: ~377
  • Question views: 231
  • Qualifying answer views: 37, 110

231 + 37 + 110 = 378. Maybe I caused one of those view bumps while collecting this data.

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    So, you're saying the views for all such questions, and questions-with-answers, are added up?
    – einpoklum
    Commented Jan 2, 2018 at 21:32
  • @einpoklum yes, your "impact" number is the sum of all that for all your posts. Commented Jan 2, 2018 at 21:38

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