[ptm]

We can check the gender ratio [1] of the subreddit /r/hackernews (assuming the two have the same audience distribution). Unfortunately, the subreddit does not appear on the gender ratio page.

[1] http://bburky.com/subredditgenderratios/

If you check related subreddits,

/r/startups - 86:14

/r/sideproject - 91:9

/r/programming - 93:7

/r/webdev - 89:11

/r/cscareerquestions - 83:17

/r/netsec - 96:4

/r/technology - 85:15

Based on these numbers 10:1 seems like a good guess.

[kleer001]

roughly 10:1 is my personal experience irl geek hobbies/jobs