Google Dictionary
Google dictionary uses a phonetic notation same as NORD (New Oxford American Dictionary).
To figure out an unknown phonetic notation, the simple way is to look up a few words that you know how to pronounce: church, hat, which, judge, game, thing, ship, thin, this, yes, pleasure cat, pay, care, father, arm, let, see, here, city, my, pot, no, caught, war, force, boy, put, tour, boot, out, cut, word, item, rabbit, winner, pupil