18

I was wondering how many question and answers are posted each day at Stack Overflow?

I have gone through how many questions are opened Daily on Stackoverflow?, but I didn't get a perfect answer.

21

For questions:

300 / hour

7.2K / day

72K / 10 days

720K / 100 days

2.628M / year

Source


For answers:

Figure we do the math:

There are about 300 questions per hour -- 77% of which have at least one answer (based on this), so that is about 230. Half of that 230 have at least 3 answers, so that is another 230, about an eighth of the original 150 may have 4+ answers which is about another 100 - 300 answers... So 230 + 230 + 200 ish is about 660 answers , so about:

660 / hour

15.84K / day

158.4K / 10 days

1.584M / 100 days

5.782M / year


Based on real data from the past year (Sept 2012 - Sept 2013):

Source

There have been 2,170,441 Questions over the past year which calculates to about:

~247 / hour

~5.946K / day

~59.46K / 10 days

~594.6K / 100 days

~2.17M / year


There have been 3,275,577 Answers over the past year which calculates to about:

~374 / hour

~8.974K / day

~89.74K / 10 days

~897.4K / 100 days

~3.276M / year

  • I updated my answer more @Bart MATH!! – amanaP lanaC A nalP A naM A Oct 14 '13 at 13:53
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    Pshh, math .... as if that has even proven anything. P.s. you might want to check your figures at the end there ... – Bart Oct 14 '13 at 13:54
  • @Bart hmmm where did I go wrong? Did I do maths wrong?!?! – amanaP lanaC A nalP A naM A Oct 14 '13 at 13:56
  • 10.8k / 10 days --> ??? / 100 days – Bart Oct 14 '13 at 13:56
  • 10.8K * 10 === 1.08 million... no? Unless I don't know my tens multiplication table.... CRAP!!! You are right!! – amanaP lanaC A nalP A naM A Oct 14 '13 at 13:57
  • @Bart silly me :-P the 1st number was wrong and the last one was right ^_^ I fixed it!! YAY~~~ ^_^ – amanaP lanaC A nalP A naM A Oct 14 '13 at 13:59
  • @amanaPlanaCAnalPAnaMA: That greats, i doesn't even guess these much answers are given.. – Toseef Khilji Oct 14 '13 at 14:00
  • Don't tell me you came up with the correct last figure based on wrong assumptions about the previous ones. I should really have you look at my code. I never get stuff to work when it really shouldn't! – Bart Oct 14 '13 at 14:01
  • @Bart lol I got the last figure first then did division. I put the decimals in the wrong places :-P – amanaP lanaC A nalP A naM A Oct 14 '13 at 14:01
  • What percentage of these questions remain on the site? I suppose most of them get closed and deleted. – Calmarius Oct 14 '13 at 14:05
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    Is there a basis for "half of which have at least one answer..." and the following numbers or are they just an assumption? That would imply that the answer/question ratio is dropping, since overall the site has 11M / 5.9M answers to questions. – Geobits Oct 14 '13 at 14:07
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    @Geobits I am making complete guesstimates. Given that there are 300 questions per hour. – amanaP lanaC A nalP A naM A Oct 14 '13 at 14:08
  • 1
    @Geobits updated with new numbers based on 77% answered as opposed to 50% – amanaP lanaC A nalP A naM A Oct 14 '13 at 14:17
  • 2
    So, TL;DR: A lot. – Rocket Hazmat Oct 14 '13 at 14:20
  • 1
    @jmac Exactly and if you look at my calculations I factor that all in :-) – amanaP lanaC A nalP A naM A Oct 14 '13 at 15:10
3

From August - September 13, there were 306,484 answers, which makes about 9,886 answers per day.

  • Does that query only count answers? Or both questions and answers? – amanaP lanaC A nalP A naM A Oct 14 '13 at 14:46
  • @amanaPlanaCAnalPAnaMA where PostTypeId = 2 so it means only answers, I'll fix the post. – Shadow The Princess Wizard Oct 14 '13 at 14:48
  • @amanaPlanaCAnalPAnaMA: yes, I did mean answers, my bad. – Qantas 94 Heavy Oct 14 '13 at 14:50
  • @Qantas94Heavy I hope you don't mind that I updated your query to use in my updated answer. – amanaP lanaC A nalP A naM A Oct 14 '13 at 15:15
  • @amanaPlanaCAnalPAnaMA: of course not. – Qantas 94 Heavy Oct 14 '13 at 15:19
2

From September 13th, to October 13th.

This obviously varies greatly depending on the number of weekdays, national holidays, etc. You will have less questions/answers on a weekend than a weekday, more within US working hours than outside, etc.

  • This is also not including any deleted posts... – amanaP lanaC A nalP A naM A Oct 14 '13 at 14:58
  • Correct. It does not. (I do not think that deleted posts would be as consistent since many deleted posts would be spam which I can't imagine is steady...that is a totally separate good question though). @amanaPlanaCAnalPAnaMA – jmac Oct 14 '13 at 15:00

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