One of the most lively discussion around the web might be exactly How many Google+ [plus] users are there till now?well , lots of online analysis, articles might be bidding around web some says it 18 million , 20 , 25 and some critics says it’s hype.Like a normal enquirer we did some sort of research on finding the answer for total number of Google+ Profile users.We tried some common Google search query tricks like site: inurl: queries but as most suggests it provide different and inaccurate count [URLs indexed ] search results from Google [totally depends on Google named location servers] .So we jumped into a conclusion from Google+ sitemap.xml.Amazingly we got a results of Total Indexed Google Profiles, Indexed inactive Google profiles [not using Google+, just using mail and other Google products] and finally Indexed Google+ Profiles.And the result for active Google+ users are around 20 million [Updated to 21 Million as on Sep 22] till now , and yes, Google+ is growing faster.
First of all our accuracy and method of finding Google+ users can be questioned , but as a proof we provide that our results exactly matched as provided by analysis results from other websites .
Our results as on Sep 19 2011 [Updated Results Given Below]
- Total there are 74750000 [seventy-four million] indexed Google profiles
- Among 74750000 indexed Google profiles there are 20930000 [twenty million] Google[+] plus profiles and 53820000 [fifty-three million] inactive Google profiles [not active Google+ users]
How we did the process of above calculation?
The research began with the Robot.txt file of plus.google.com the official Google+ URL [Robots.txt is a text (not html) file you put on your site to tell search robots which pages you would like them not to visit].
First begin with robot.txt file of plus.google.com , Type in Browser URL bar https://plus.google.com/robots.txt will return following result
Here as most of you know a Sitemap is an XML file that lists the URLs for a site.so next we have to find out what is in profiles-sitemap.xml of Google Plus.
So Now type http://www.gstatic.com/s2/sitemaps/profiles-sitemap.xml in Chrome browser URL bar .It will take some time to render since it’s a long content file.
Now upon rendering Google+ sitemap file it displays some “.txt” files [for eg:http://www.gstatic.com/s2/sitemaps/sitemap-00012752.txt], which exactly contains the URL’s of Google Profile that is been indexed by Google.Look into below image
Now just search in this file [from Google chrome browser, since it shows count - mostly Firefox doesn't shows the count of searched text ] press CTR + F and type in search box .txt or http , which returns 14950 results.That means there are exactly 14950 .txt files where in each of these files contains the number of Google Profile URL’s.
Now copy any of those .txt URL’s file and paste in the browser.It wll display a lots of Google Profile URL’s like https://profiles.google.com/ , also some are https://plus.google.com/ .And in each .txt URL’s file there are exactly 5000 URL’s given, to find just press CTR + F and type in search box https , it will return the count as 5000.
That means Total Google Profiles = 14950 .txt files * 5000 google Profile URL’s = 74750000 indexed Google profiles [seventy-four million ] .
Here one thing to note that in each .txt URL’s file profiles.google.com are in google profiles[i.e they are not yet using Google+] and plus.google.com are Google+ profiles.
Now the most tedious tasks come to find out to find exactly what number of active Google+ profiles and inactive Google+ Profiles are there.
Do a rough check that in each ,.txt URL or sitemap.txt there are around 3600 [avg] https://profiles
To find it just type any of the .txt URL for eg:http://www.gstatic.com/s2/sitemaps/sitemap-00012752.txt in the URL bar and just press CTR + F and type in search box https://profiles , it will return a count around 3600 [check any of those .txt URL, you will get a count of profiles exactly around 3600].
Since in each In each sitemap.txt there are around 3600 [avg] https://profiles = 3600*14950 =53820000 indexed inactive Google+ profiles or simply Google profiles without using G+ [fifty-three million]
Similarly find the number of active Google+ Profiles just type any of the .txt URL for eg:http://www.gstatic.com/s2/sitemaps/sitemap-00012752.txt in the URL bar and just press CTR + F and type in search box https://plus , it will return a count around 1400 [check any of those .txt URL, you will get a count of profiles exactly around 1400]
Since in each sitemap.txt there are around  [avg] https://plus = 1400*14950 =20930000 active indexed Google plus profiles [twenty million]
Now to check the result add up 53820000 inactive Google profiles+ 20930000 active Google plus profiles =74750000 [seventy-four million ] which is same as our above result .So in overall estimation there are 20930000 active Google plus profiles and 53820000 inactive Google+ profiles.
To check these results just do a Google search in http://www.Google.com for site:https://profiles.google.com/ which returns 54200000 results that means almost similar to our calculation.
But in case of site:https://plus.google.com/ it’s 44300000 results which means the Google results are doubled with respect to exact site map calculation [might be Google plus URLs links within profiles are also indexed]
Also most research analysis around the web indicates there are around 20 million Google+ users are there, so our calculation of Twenty Million Nine Hundred Thirty Thousand shows exact matching results.
Updated Results as on Sep 22:
With in 4 days around 1 Million Google+ Profiles were created.
Total there are 76187569 [seventy-six million] indexed Google profiles
Among 76187569 indexed Google profiles there are 21332553 [twenty one million] Google[+] plus profiles and 54855016 [fifty-three million] inactive Google+ profiles [not active Google+ users]
As our fiirst calcul;ation as on this post was as on Sept 19 , but now since G+ is available open Public beta or no invitation required, The number of G+ profiles created are much faster .The plus.google,com -sitemap.xml is been rapidly added with new profiles list, from Sept 19 to Sept 22 , around
1437569 additional profiles were added.If you check http://www.gstatic.com/s2/sitemaps/profiles-sitemap.xml now , there are 15238 .txt files in that sitemap.xml.And note that on the last .txt [15238 .txt] file there are only 2569 profles compared to 5000, since daily new profiles are added to the list it’s growing..So on below calculation we avoid the last .txt files[later added]
With new Profiles
15237 *5000 =76185000 + 2569 profiles on last .txt files = 76187569
=>1437569 profiles added from sep 19 to sep 22
3600*15237 =54853200 inactive Google+ Profiles
1400*15237=21331800 active Google+ Profiles
Since the last .txt file contain only 2569 profiles , where total Google+ profiles are 753 and Inactive G+ Profiles are 1816
So 54853200+1816=54855016 inactive G+ Profiles and 21331800 + 753 =
21332553 active Google+ Profiles
Note:This post is not intended to any harm for any Google+ analysis results, Try it yourself and if any error please comment