About RiverOdds
RiverOdds is a free Texas Hold'em odds calculator and poker math reference built for players who want fast, accurate answers — at the table or while studying a hand. No account. No paywall. No install.
What RiverOdds Does
The calculator estimates win probability, pot odds, draw outs, and board texture for Texas Hold'em hands. The guides explain the underlying poker math in plain language, covering equity, implied odds, hand rankings, positions, and common matchups.
RiverOdds is built as a lightweight browser tool — fast, private, and accessible from any device without setup.
Win Probability
Exact equity percentage for each player via Monte Carlo simulation — 10,000+ simulations per calculation, expressed as precise percentages rather than rule-of-thumb approximations.
Draw Outs
Every flush draw, straight draw, and pair draw identified with outs count and hit probability — so you know exactly how live your draw is on any street.
Board Threats
Highlights which strong hands opponents can plausibly hold given the community cards, helping you read the board texture and range dynamics more accurately.
Pot Odds Calculator
Enter pot size and bet amount to instantly see whether calling is +EV — comparing the pot odds offered to your equity in the hand.
Shareable URLs
Every hand configuration generates a unique URL you can bookmark, share, or use to discuss a specific spot with study partners or coaches.
How the Calculator Works
The engine uses Monte Carlo simulation — randomly dealing the remaining deck cards thousands of times, evaluating the resulting hands, and counting outcomes to derive win, tie, and loss probabilities for each player.
- Each calculation runs 10,000–50,000 simulations in under 100 milliseconds, entirely in your browser.
- Results are expressed as exact percentages, not approximations from lookup tables.
- The engine accounts for full hand combinations, board texture, and multi-way pot dynamics with up to 8 players.
- No data is sent to a server — all calculations happen locally in your browser for complete privacy.
Why It Exists
Most accurate poker equity tools are desktop-only, expensive, or require account creation. RiverOdds was built to fill that gap — a fast, free, browser-native option for anyone who wants real numbers without friction.
- Make poker odds easier to verify without installing software.
- Give beginners clear reference material for common Texas Hold'em situations.
- Help experienced players review hands faster with shareable calculator states.
- Provide a free alternative to expensive desktop poker software like Equilab or Flopzilla.
- Give mobile players instant access to accurate odds without a dedicated native app.
The Poker Guides
RiverOdds includes a library of free poker strategy guides covering the math and concepts every Hold'em player should understand. Each guide is written to be practical — focused on how to apply the concepts at the table.
Accuracy & Methodology
Probabilities in the calculator are derived from direct Monte Carlo simulation, not simplified lookup tables. The guide content is grounded in combinatorial analysis of the full 52-card deck.
- The Rule of 4 & 2 approximation (used in our guides for quick mental math) introduces ≤3% error versus exact probabilities — appropriate for real-time table decisions.
- Exact calculator percentages are precise to within ±0.5% at 10,000 simulations, with accuracy improving at higher iteration counts.
- Hand probability tables (e.g., in Poker Hand Rankings and Texas Hold'em Probability guides) are computed from C(52,7) = 133,784,560 total 7-card combinations — covering every possible board + hole card scenario.
- Multi-way pot calculations account for the reduced deck after each player's hole cards are assigned, ensuring accurate conditional probabilities across all streets.
Important Note
RiverOdds is an educational and analysis tool. Poker involves variance, incomplete information, and local legal restrictions. Use the numbers as decision support, not as a guarantee of any outcome.
The guides are educational; they do not replace practice, live-play experience, or professional coaching. Improving at poker requires repetition, review, and honest self-assessment — the calculator and guides are starting points, not shortcuts.
Start Calculating
Try the main Texas Hold'em odds calculator or browse the strategy guide library.