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I am just curious; what percentage of total users does Stack Overflow make up? I know that I could count them, but with 200+ sites that seems inefficient.

I don’t care about active users or not, nor do I care about unique users.

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  • 1
    Well are you counting a user active on two sites as 1 or 2 because if we have to count unique users that's somewhat harder.
    – Robert Longson
    Commented Mar 23, 2023 at 13:32
  • stackexchange.com/sites#users at first glance around 50% each.
    – Robert Longson
    Commented Mar 23, 2023 at 13:33
  • 7
    Re "I don't care about active users or not, nor do I care about unique users": That is the company spirit!
    – This_is_NOT_a_forum
    Commented Mar 23, 2023 at 19:21
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    why don't you care about unique users? As I've shown in my answer, it's not that hard to get a unique count for network accounts.
    – starball
    Commented Mar 24, 2023 at 1:37
  • At the moment that really is the company spirit @This_is_NOT_a_forum
    – Starship
    Commented May 31, 2023 at 23:54

2 Answers 2

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Courtesy of Count all users on Stack Exchange (answer by rene), from the last SEDE refresh, the result is 24,983,588.

Today, https://stackexchange.com/sites reports 20,080,969 users on Stack Overflow.

So roughly 80.38%.

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I copy-pasted https://stackexchange.com/sites#users to a text file users_allsites.txt. Then I used the following Python code:

import re

multi = {"k": 1000, "m": 1000000}

users = open("users_allsites.txt", "r")
total_users = 0
for line in users:
    res = re.match("(\d+)([km]) users", line)
    if res:
       total_users += float(res.group(1)) * multi[res.group(2)]
print("total users:", int(total_users))
print("SO: ", 20000000/total_users)    
users.close()

This results in:

total users: 33752000
SO:  0.5925574780753733
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  • so you assume that every user is only a user on a single network site?
    – starball
    Commented Mar 24, 2023 at 1:16
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    oh. I just read the comment where the asker says they don't care about unique users. That's disappointing of them.
    – starball
    Commented Mar 24, 2023 at 1:28
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    @starball this (sort of) answers the question of which percentage of (per-site) accounts on SE sites are SO accounts, which may be interesting as well (and for a certain definition of user you could say that a per-site account is a user). However, my answer was mostly intended as an attempt to implement the comment of Robert Longson that you can calculate this from the sites#users page.
    – Marijn
    Commented Mar 24, 2023 at 7:05

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