Probability, made explorable.
Instant, accurate odds for the games people actually play — poker, blackjack, and Yahtzee. Every answer is computed in advance, so nothing here makes you wait.
What do you want to know?
Is my poker hand any good?
Pick two cards, see your real win odds at any table size.
Should I hit or stand?
The correct blackjack play for every hand, and why.
Which dice should I keep?
Optimal Yahtzee rerolls for whatever you just rolled.
What are the odds of a Yahtzee?
Exactly 4.6%. Here’s every other category too.
Think you already know the odds?
Test your instincts against the real numbers. Most people are surprised by how often they’re wrong — especially about how much table size changes everything.
Browse by game
Every tool runs on precomputed data, so results are instant.