If you want to know how long it may take you to go between certain levels... there's a nifty rankings/experience calculator at: MW2EXP

Only a very rough idea of time, but gives a pretty good overview of the experience required etc.
May help people out a bit, I guess.

:P
according to that, it will take me 4months to reach level 70

Sorry that thing is worthless and not even close to a good estimate for anything

Its says roughly 3 weeks for me to gain 20 lvls ....

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With challenges is alot quicker than that,says 3 weeks to reach 2sd prestige.

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Yeah, it's a very rough idea of things - but the time estimate uses your own averages... so it just saves you the time of doing the math.

Ya a rough estimate thats so far off that take whatever it tells you are divide it by like 5 .. lol

Thanks for the share tho, perhaps maybe one day they will update it with more features and make it more accurate

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well, it's going to take me about 3 weeks to reach 1st prestige, so if i play like i have been, that's 33 weeks to reach 10th prestige level 70. it gave me 46, which is probably about right because i've been playing A LOT. it's really subjective, because some games i get over 20000 with challenges, and some matches i get 1500.