third time lucky

i keep posting my question on the wrong forum. lets try again.

i'm having problems understanding the odds of me winning a particular hand.

i was playing in a game around my mates house. i had never played there before. i sat at the table for 55minutes without playing a hand. i then got dealt 6,6. i was the big blind ($10) and everyone hand folded apart from 1 person, who raised $10. i called(because he was someone who played most hands, so i thought he didn't have much). the flop came 6, 2, q. i checked. he bet $40. i re-raised all-in for this reason; i felt, at best, he only had q,? (giving him a pair).

the question i have is this: how do i calculate my chances of winning the hand after the flop? i thought i had the best hand at that moment, but with two cards left, it could be beaten? (he may have two pairs, or an overpair).

Please note. a number of people have replied previously (thank you). however their response has been 'look at an odds compilier website'. the problem is, that is not possible when i'm sat at a table, in the middle of a game.

please help