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Amazing Casino Tools For Awesome People
Top 10 most searched tools
See all 50Our own slot machines
See all 21Just added
- Card Pack Expected-Value Calculator What a pack of trading cards is worth, net of resale fees, against what it costs to open it.New, Oct 3
- Crash Auto-Cashout Simulator Set an auto-cashout target and see what a real session does to your bankroll, not just one round's odds.New, Sep 28
- Gambling Loss Tracker Turns deposits and withdrawals into the turnover behind your result, priced off published Nevada hold data. Nothing saved.New, Sep 24
- Exacta Calculator Price a straight, box, key or key-box exacta ticket, and estimate what it pays if your combination hits.New, Sep 20
- Roulette Spin Tracker Log real spins and get a real answer, not a colorful grid.New, Sep 17
- NFL Teaser Calculator Prices a teaser by the specific numbers it crosses, not a flat payout table that cannot see it.New, Sep 14
- Pai Gow Poker Hand-Setting Trainer Deal seven cards, set your hand, then see the house way and the cost of your choice against best play.New, Sep 14
- Push/Fold Nash Chart The equilibrium shove range for a short stack, with the calling range beside it, close hands left uncolored.New, Sep 14
- Prediction Market Exit-Cost Calculator See what closing a Kalshi or Polymarket position pays right now, after the spread and trading fee.New, Sep 13
- Problem Gambling Screening (PGSI) The nine-question PGSI, scored as published, with support resources beside your result. Nothing you enter is saved.New, Sep 13
Blackjack, every way
- BlackjackPlayFour tables with a strategy coach on every decision, and a mode for counting the shoe.
- Daily blackjackPlayOne shoe a day, the same for everyone, scored on decisions and not on chips.
- Card Counter Trainer Tool Keep a running count, Hi-Lo or Hi-Opt I, against a dealt shoe at four speeds, scored on accuracy.
- Blackjack Basic Strategy Trainer Tool
- House Edge Comparison Tool The house edge on every common casino bet, side by side, and what it costs you per hour.
- Blackjack Side Bets Tool What 21+3, Perfect Pairs, Lucky Ladies and Royal Match cost, at your shoe size and pay table.
The 10 most expensive bets in the casino
Compare all 41- 27%house edge1. Keno casino keno ticket
- 19%house edge2. Big Six / Money Wheel average across symbols
- 17.64%house edge3. Blackjack Lucky Ladies, 6 decks
- 16.67%house edge4. Craps Any 7 (one-roll)
- 14.36%house edge5. Baccarat Tie (8:1)
- 10%house edge6. Slots tight penny machine
- 8.56%house edge7. Three Card Poker 6 Card Bonus, best schedule
- 7.89%house edge8. Roulette American five-number bet
- 7.69%house edge9. Roulette American triple-zero
- 7.61%house edge10. Baccarat Dragon 7 side bet
One shoe a day
Daily blackjack
One shoe a day, the same for everyone, scored on decisions and not on chips.Sit downJ♦
A♣
Odds calculators
See all 15- Odds Converter Convert between decimal, fractional and American odds, and see the implied probability.
- Parlay Calculator Combine each leg's odds into one price and payout, and fair odds showing how the margin compounds.
- Hedge & Cash-Out Calculator The stake that locks in equal profit either way a bet lands, and whether the cash-out offer beats it.
- Dutching Calculator Split one stake across several selections so you collect the same amount whichever one wins.
- Arbitrage Calculator Check whether two or more prices on the same event lock in a profit, and get the stake for each side.
- No-Vig Fair Odds Calculator Strip the bookmaker's margin out of a market to see the fair price behind every outcome.
- Each-Way Bet Calculator Work out the win, place and lose returns on an each-way bet, and when the place part is the value.
- Lay Bet & Matched Betting Calculator Get the exchange lay stake, liability and locked-in result for a qualifying bet or a free bet.
- Middle Calculator Price a middle on both sides of a moved line: what it pays, what a miss costs, and how often it has to land.
- CLV Calculator Work out your closing line value, and whether the sample you have is large enough to mean anything yet.
- Round Robin Calculator Price every card a round robin can settle into, and the number of legs it needs before it pays for itself. Also prices the UK full-cover reading: 3 doubles, 1 treble and 3 up-and-downs on exactly 3 selections.
- Prediction Market Exit-Cost Calculator See what closing a Kalshi or Polymarket position pays right now, after the spread and trading fee.
- Pari-Mutuel Payout Calculator Estimate a win, place or show payout from the pool sizes, and see what the takeout and your own stake cost you.
- NFL Teaser Calculator Prices a teaser by the specific numbers it crosses, not a flat payout table that cannot see it.
- Exacta Calculator Price a straight, box, key or key-box exacta ticket, and estimate what it pays if your combination hits.
The casino floor
See all 12- BlackjackFour tables with a strategy coach on every decision, and a mode for counting the shoe.
- Daily blackjackOne shoe a day, the same for everyone, scored on decisions and not on chips.
- RouletteAmerican, European and French wheels, with the cost of your layout priced before every spin.
- BaccaratAn eight-deck shoe with Player, Banker and Tie priced before every deal.
- CrapsPass Line, Odds, Field and more, with the house edge of every bet you put down.
- Sic BoThree dice and the full layout, with every bet priced before the roll.
- Dragon TigerOne card each from an eight-deck shoe, with Dragon, Tiger and Tie priced before every deal.
- Andar BaharOne joker, two piles, and the exact price of the side that gets the first card.
- Casino WarOne card each, and the war-or-surrender call graded against the exact odds.
- Red DogWill the third card fall between? Every raise graded against the exact odds.
- Money wheelSpin the classic Big Six wheel and see what each symbol really costs before it turns.
- Pai Gow TilesSet four Chinese dominoes into two hands, with all three settings priced exactly.
Around the roulette wheel
- RoulettePlayAmerican, European and French wheels, with the cost of your layout priced before every spin.
- Roulette Payouts Tool Every bet type, what it pays and what it does to a session.
- Martingale Simulator Tool Run a doubling progression against your own base bet, table limit and bankroll, and see how often it busts.
- House Edge Comparison Tool
- Roulette Strategy Simulator Tool
- Roulette Spin Tracker Tool
Numbers we found ourselves
See all 5- Hold is not the house edge+1.35 pointsof the +1.38 points rise in Nevada's slot hold is the same machines getting more expensive, not players moving to worse ones
- What a prediction market actually charges9.9cmedian two-way cost per dollar of payout across 78,119 quotable Kalshi markets
- The number on the box4.2 timesmore per dollar staked at a title's lowest published setting than at its advertised one, at the median
- The number the market hung4.80%how often the tightest spread middle landed over 26 seasons, against the 4.76% it has to clear to break even
- The mean is not the outcome125 of 180scenarios in which the median attempt, not the unlucky one, lost the entire deposit
Bankroll and staking
See all 5- Bankroll Calculator Turn your bankroll and unit size into a flat stake, and see what a long losing run leaves of it.
- Wagering Calculator What actually happens when you try to clear a bonus, not just the average.
- Kelly Stake The stake that maximizes long-run growth from your odds and win chance, and what half Kelly gives up.
- Risk of Ruin Calculator The chance a bankroll gets wiped out, from your edge, your swings and how many units you hold.
- Free Bet Value Calculator What a stake-not-returned free bet is actually worth, and the lay odds that turn it into guaranteed cash.
Keeping it in check
See all 2One click, one result
See all 8- CrashCash out before the multiplier crashes, and see why no target changes the cost.
- LimboCrash without the wait: name a target, get the result, see what it costs.
- DiceRoll under or over a target, and see why the slider never changes the cost.
- MinesPick the mine count and see the chance and multiplier of every tile before you reveal it.
- PlinkoA peg board where risk changes the spread of results, with every slot's odds shown.
- TowersClimb a tower of hidden traps, with every row's chance and multiplier shown on each difficulty.
- Hi-loAn endless deck, with the chance and the price of both guesses shown before you choose.
- Coin flipHeads or tails, with every streak's chance and multiplier shown and the coin's real runs counted.
The poker room
- Three Card PokerPlayThree cards against the dealer, with every play or fold checked by the coach.
- Caribbean StudPlayFive-card poker against the dealer, with every raise or fold priced exactly.
- Hold'em vs the DealerPlayTexas hold'em against the dealer, with every raise, check and fold graded by a coach.
- Let It RidePlayThree bets, two chances to take one back, and a coach that counts every card to come.
- Four Card PokerPlayFive cards against the dealer's six, graded against a strategy short enough to remember.
- Pai Gow PokerPlaySeven cards against the dealer, with every split checked against the house way.
- Teen PattiPlayThe casino version against the dealer, with every play or fold priced in chips.
- Push or fold pokerPlayHeads-up all-in or fold against a Nash-chart opponent, with every decision graded.
- Poker Hand Odds Tool
- House Edge Comparison Tool
- Poker Pot Odds Calculator Tool
- Three Card Poker Odds Tool Exact hand frequencies, the Q-6-4 rule, and house edge on Ante-Play and every Pair Plus pay table.
- ICM Calculator Tool Turn tournament chip stacks into real money equity, and see how much a chip lead is actually worth.
- MDF & Bluff Ratio Calculator Tool From one bet size: the equity to call, the minimum defense frequency, and the right bluff-to-value mix.
- Pai Gow Poker Hand-Setting Trainer Tool
- Push/Fold Nash Chart Tool
Probability and expected value
See all 14- Variance Simulator See how far results swing over a session before the edge shows.
- Poker Hand Odds How often a Hold'em hand or range wins, ties and loses, against a hand, a range or any two cards.
- Slot Volatility Simulator Play out a slot session at any RTP and volatility, and see how often a bankroll actually doubles or busts.
- Roulette Strategy Simulator Run Martingale, D'Alembert, Fibonacci, Paroli or Labouchère over many sessions, watch what happens.
- Three Card Poker Odds Exact hand frequencies, the Q-6-4 rule, and house edge on Ante-Play and every Pair Plus pay table.
- Keno Odds Calculator The exact chance of catching each number of your spots, and the house edge on a keno pay table.
- Video Poker Return Calculator Type in any pay table and get the exact optimal-play return, solved over all 2,598,960 deals.
- ICM Calculator Turn tournament chip stacks into real money equity, and see how much a chip lead is actually worth.
- MDF & Bluff Ratio Calculator From one bet size: the equity to call, the minimum defense frequency, and the right bluff-to-value mix.
- Blackjack Side Bets What 21+3, Perfect Pairs, Lucky Ladies and Royal Match cost, at your shoe size and pay table.
- Deuces Wild Video Poker A positive-expectation video poker variant, solved exactly and priced for a bad read.
- Crazy Time Spread Pricer What a Crazy Time spread costs, from the wheel's 54 real segments, priced as an honest floor, not a guess.
- Push/Fold Nash Chart The equilibrium shove range for a short stack, with the calling range beside it, close hands left uncolored.
- Card Pack Expected-Value Calculator What a pack of trading cards is worth, net of resale fees, against what it costs to open it.
5 guides, in reading order
See the path- Betting Odds Explained: Decimal, Fractional, American and Implied ProbabilityPart 1
- Expected Value in Betting: How to Know if a Bet Is Worth MakingPart 2
- House Edge, RTP and What Casino Games Actually Cost YouPart 3
- Bankroll Management: Unit Sizing, Staking and DownswingsPart 4
- Do Betting Systems Work? Martingale, D'Alembert and the RestPart 5
Sports and racing
- SportsbookPlayBuild a bet slip on simulated matches and see what the bookmaker's margin costs.
- Horse racingPlayBack invented horses to win, place or run an exacta, and see what the track's takeout costs.
- Parlay Calculator Tool
- Hedge & Cash-Out Calculator Tool
- Dutching Calculator Tool
- Free Bet Value Calculator Tool
- Arbitrage Calculator Tool
- No-Vig Fair Odds Calculator Tool
- Each-Way Bet Calculator Tool
- Lay Bet & Matched Betting Calculator Tool
- Middle Calculator Tool
- CLV Calculator Tool
- Round Robin Calculator Tool
- Pari-Mutuel Payout Calculator Tool
- NFL Teaser Calculator Tool
- Exacta Calculator Tool
Trainers and simulators
See all 7- Expected Value Calculator Odds plus your true probability, as expected value per bet.
- Martingale Simulator Run a doubling progression against your own base bet, table limit and bankroll, and see how often it busts.
- Card Counter Trainer Keep a running count, Hi-Lo or Hi-Opt I, against a dealt shoe at four speeds, scored on accuracy.
- Blackjack Basic Strategy Trainer Set your table's rules, see the chart they produce and the cells that move, then drill it hand after hand.
- Poker Pot Odds Calculator Turn the pot, the bet and your outs into a call-or-fold answer, and drill the decision until it's instant.
- Pai Gow Poker Hand-Setting Trainer Deal seven cards, set your hand, then see the house way and the cost of your choice against best play.
- Crash Auto-Cashout Simulator Set an auto-cashout target and see what a real session does to your bankroll, not just one round's odds.
Draws and tickets
See all 6- KenoMark your spots, watch the draw, and see what each ticket costs before you buy it.
- BingoSingle-player bingo with the exact odds of every pattern printed beside the cards.
- LotteryPick your numbers, watch the draw, then play the same ticket for decades in an instant.
- Scratch cardsA match-three card with every prize and its exact odds printed beside it.
- Pull tabsTickets from one finite box, with the return of what is left counted as it sells.
- Mystery boxesOpen practice boxes with every item's odds printed, and see what a box is really worth.
Video poker cabinets
- Video pokerPlay9/6 Jacks or Better, with every hold checked against the exact best one.
- Deuces WildPlayEvery two is wild, with every hold checked against the exact best one.
- Double BonusPlayFour of a kind pays by rank, with every hold checked against the exact best one.
- Joker PokerPlayOne wild joker in the deck, with every hold checked against the exact best one.
- House Edge Comparison Tool
- Video Poker Return Calculator Tool
- Deuces Wild Video Poker Tool
Payouts and house edges
See all 7- Roulette Payouts Every bet type, what it pays and what it does to a session.
- House Edge Comparison The house edge on every common casino bet, side by side, and what it costs you per hour.
- Baccarat Odds & Commission The odds behind banker, player and tie, and how the commission decides which bet is best.
- Craps Odds & House Edge The house edge on every craps bet, derived from the dice, and how much taking odds behind the line cuts it.
- Provably-Fair Verifier Recompute a round from its seed triple, in your browser, against the operator's published result.
- Sic Bo House Edge Every bet on a Sic Bo table, priced from all 216 dice combinations, the tenfold spread in one place.
- Roulette Spin Tracker Log real spins and get a real answer, not a colorful grid.
Quick answers
The maths behind the odds, worked to a number
Four questions a new player actually arrives with, each worked out below, with the full method one link away.
- 01
How do I convert odds to implied probability?
Divide 1 by the decimal odds. 2.50 decimal is 1 / 2.50 = 0.40, a 40% implied chance. American +150 is 100 / (150 + 100) = 40%, and fractional 3/2 is 2 / (3 + 2) = 40%, every format describes the same probability.
Full method: betting odds explained - 02
What is a positive expected value (+EV) bet?
One where the price is better than the true probability, so you profit on average over many bets. If your fair estimate is 1.90 decimal and a book offers 2.10, that gap is roughly +10% expected value per unit staked.
Full method: expected value betting - 03
How much of my bankroll should I stake?
Enough to survive variance. A flat 1–2% per bet is a common cautious rule. The Kelly criterion sizes the stake from your edge and the odds, and most people use a half- or quarter-Kelly fraction to smooth the swings.
Full method: bankroll management - 04
Does the Martingale system work?
Not over time. Doubling your bet after every loss recovers small amounts until a losing streak pushes the next bet past the table limit or your bankroll, and then a single run wipes out every prior gain.
Full method: betting systems explained
Who makes this
The person building this, and what he does for a living.
Alexander Korsager is the founder of actfap.com. He has worked in iGaming since 2016 and is currently Chief Gaming Officer at Legend, where he oversees Casino.org and Casino.guru. actfap.com carries no affiliate links, no ads, no paid placements and no operator relationships of its own, built and funded independently of that day job.
About actfap
The full story: the founder, the conflict disclosed plainly, and how every calculator's figure is sourced and tested.
Corrections policy
How to report a wrong number or claim, and what happens once one is confirmed.
Responsible gambling
Warning signs, staying in control, and where to get free, confidential help.
21+, and only where gambling is legal where you are. Working the numbers out correctly does not remove a house edge or turn a losing bet into a winning one, and gambling can cause serious harm. The National Problem Gambling Helpline is free, confidential and open 24/7: call or text 1-800-MY-RESET (1-800-697-3738), or chat at ncpgambling.org/chat. More on staying in control.