Enter your hole cards and board cards. Get win probability from a real simulation, plus outs and pot odds.
Click a slot, pick the rank and suit for your hole cards and any board cards, then set how many opponents are in the hand. The page runs a simulation — thousands of random deals for the cards you have not seen — and reports how often you win. Enter the pot and the bet you are facing to compare your equity against the price.
Leave board slots empty before the flop. The simulation fills them in, which is what "random runout" means.
You hold two hearts and the flop brings two more hearts, so you have a flush draw with 9 hearts left in the deck. There are 47 unseen cards.
| Measure | Value |
|---|---|
| Outs | 9 |
| Chance of hitting by the river | about 35% |
| Pot and bet | $100 pot, $30 to call |
| Pot odds | 23.1% |
You need to win 23.1% of the time to break even on the call, because $30 into a $100 pot means calling $30 to win $130. With 35% equity you are comfortably ahead, so the call makes money in the long run. The rule of thumb gets you close: with two cards to come, multiply outs by four for a rough percentage, and with one card to come, multiply by two.
The win percentage is an estimate from simulation rather than an exact calculation. That is not a weakness: with several opponents the exact number requires enumerating millions of combinations, and a large sample of random deals lands close enough for a decision. Run it again and the figure will move by a fraction of a percent.
Equity and pot odds answer different questions. Equity is how often you win at showdown; pot odds are the price being offered. A hand with 35% equity is profitable to call when the price requires less than 35%, and unprofitable when it requires more. Compare the two, and act on the comparison.
What the model leaves out: future betting, position, and the implied odds of winning more money when you hit. A flush draw that gets paid off on the river is worth more than its raw equity, and a draw that everyone folds to is worth less. Treat the number as the floor of the decision rather than the whole of it.
Close enough for practical decisions. More trials would narrow the variance, but the difference is well under a percentage point for a normal hand.
The share of the final pot you are contributing. Call $30 into $100 and you are putting in $30 of $130, which is 23.1%.
No, it deals them at random. If you can put an opponent on a range, their real hand is stronger than average, so your true equity is lower.
Because cards are revealed and unseen cards shrink. The same draw has less chance with one card to come than with two.
No. It prices a decision. Position, bet sizing and reading opponents decide whether you get to make good decisions in the first place.
Hand rankings are the ordinary poker ranking. The win percent is this page’s simulation, not a published solver.
Last updated: November 2, 2026. Reviewed by David Liu.