PokerOdds provides you with winning's probabilities for Texas Hold'em based on your hole cards, the dealt Cards and the number of active players (including yourself).
Calculations process takes around fifteen seconds, generally based on a limited number of simulations for roughly +/- 6% results accuracy. In some rare cases the calculations are done considering all dealing possibilities.
More details on the results are visible on the Details page, like opponent odds or odds for a specific hand's rank.