How it works
- 01Click any card slot to pick your hole cards.
- 02Add community cards as the hand develops — Flop, Turn, River.
- 03Results update automatically. Share the hand URL with anyone.
Texas Hold'em Odds Calculator — Free & Instant
RiverOdds is a free Texas Hold'em poker odds calculator that runs in your browser. Select your hole cards and any community cards — win probability, draw outs, board threats, and pot odds update in real time. No signup, no download, no ads.
The calculator uses Monte Carlo simulation to compute exact equity across all remaining card combinations. Unlike simplified charts, it accounts for the full range of possible runouts — giving you precise percentages for any hand configuration against 1 to 8 opponents.
What the calculator shows you
Win probability
Exact equity % for each player via Monte Carlo simulation. Updates as you enter each card.
Draw outs
Every draw you hold — flush, straight, pair — grouped by type with number of outs and hit probability.
Board threats
What strong hands your opponents can hold given the community cards. Essential for reading the board.
Pot odds calculator
Enter pot size and bet amount. The calculator shows whether calling is +EV based on your current equity.
Learn poker math
Frequently Asked Questions
How does the RiverOdds poker odds calculator work?
RiverOdds uses Monte Carlo simulation to calculate your exact win probability. Enter your hole cards and any community cards (flop, turn, river), and the calculator runs thousands of simulated hands to determine win percentage, tie probability, and draw equity for each player.
What is pot odds in poker?
Pot odds are the ratio of the amount you must call to the total pot after calling, expressed as a percentage. If the pot is $100 and your opponent bets $50, you call $50 into a $200 total pot — your pot odds are 25%. If your hand equity exceeds 25%, calling is profitable.
How many outs is a flush draw?
A flush draw has 9 outs. A standard deck contains 13 cards of each suit. If you hold two hearts and two more hearts are on the board, that accounts for 4 hearts — leaving 9 unseen hearts in the deck. The Rule of 4 & 2 converts these to ~35% equity on the flop and ~20% on the turn.
Can I use this calculator for free?
Yes. RiverOdds is completely free — no account, no ads, no paywalls. Enter any hand directly in your browser. Results appear instantly.
What is poker equity?
Poker equity is your share of the pot based on your win probability at any point in the hand. If you have a 60% chance of winning a $100 pot, your equity is $60. Equity fluctuates as community cards are revealed and informs whether calling, raising, or folding is the correct decision.
How do I calculate poker odds without a calculator?
Use the Rule of 4 & 2: count your outs (cards that improve your hand), then multiply by 4 on the flop or 2 on the turn. The result is your approximate equity percentage. For example, a flush draw with 9 outs gives roughly 36% equity from the flop (9 × 4) and 18% from the turn (9 × 2).