Originally Posted by Nexus Crawler
Assuming you make roughly 175ip average a game (this would assume 1 win for first win, and 1 loss) it would take you 42 games.
Additionally, assuming the 175 IP/game average is a reasonable estimate, 42 games would take 1,470 minutes or 24.5 hours.
(this assumes an average of 35 min as some games take only 20min while others go to 45-50min)
Now, RP can be purchased for:
$5.00 for 650 RP (130 RP / $1) (worst deal)
$100 for 15,000 RP (150 RP / $1) (best deal)
IIRC, minimum wage in the US is $7.25/hr
so one hour of wages equates to:
942.5 RP/hr at the low end, or
1,087.5 RP/hr on the high end
a 6300 IP champion usually costs 975 RP (after the new release permium for the first week or so)
So, it would either take:
24 hours of IP, or
about 1 hour of wages
Assuming your time is limited and valuable to you, it is far more time-cost effective to buy champions with RP and save IP for content that cannot be acquired with RP (runes, mastery pages etc.)