The win rate is each hand's share of every possible way the board can come out, with split pots shared. It's counted, not guessed, and it updates as soon as you change a card.
What are outs in poker?
Outs are the cards still in the deck that would put a hand that is behind into the lead. A flush draw on the flop has 9 outs: the 9 cards of its suit that are left.
How do I turn outs into a winning chance?
Use the rule of 4 and 2. On the flop, multiply your outs by 4 for your chance of hitting by the river. On the turn, multiply by 2 for the river alone. 9 outs on the flop is about 36% (the exact figure is 35%).
How is the win rate calculated?
By dealing out every possible remaining board and counting how often each hand wins, with split pots shared. After the flop every runout is counted exactly. Before the flop you see a quick estimate first, then the exact figure a moment later.
What are the odds of AA against KK?
Pocket aces win about 82% of the time against pocket kings when all the money goes in before the flop. Kings win about 18%.
Is a pair against two higher cards really a coin flip?
Nearly. QQ against AK offsuit wins about 57% to 43%. A small pair like 22 against AK offsuit is closer to 52% to 48%.
Why does it show outs before the flop?
Before the flop, hands are compared on their two hole cards alone, so the outs are the next cards that would put a hand in front. KK against AA has 2 outs: the last two kings.