Odds, payouts, edges and bankroll math.
Free betting math tools: odds converter, implied probability, parlay, Kelly criterion, expected value, arbitrage, hedge and poker pot odds calculators. No sign-up. All 20 tools below are free, run entirely in your browser, and need no sign-up.
Free betting odds converter. Convert American (moneyline), decimal, fractional and implied probability odds between all four formats instantly in your browser.
Free implied probability calculator for betting odds. Turn American, decimal or fractional odds into the break even win probability the price is offering.
Free parlay calculator. Combine up to eight legs in American or decimal odds to get the total parlay odds, payout and combined win probability.
Free Kelly criterion calculator. Find the optimal bet size as a percentage of your bankroll from your win probability and the decimal or American odds.
Free betting expected value calculator. Enter your true win probability, the odds and your stake to see the EV in dollars and whether the bet is +EV.
Free arbitrage betting calculator. Enter two opposing odds to check if a sure bet exists, then get the optimal stake split and guaranteed profit.
Free hedge bet calculator. Work out the exact stake to place on the other side to lock in a guaranteed profit or cut your loss on an open wager.
Free moneyline payout calculator. Enter American moneyline odds and your stake to see the exact profit and total return on a winning bet.
Free over under payout calculator. Enter a total, the sides odds and your stake to see if a game total goes over or under and what your bet pays.
Free bankroll management calculator for bettors. Set your bankroll and unit percentage to size flat bets and see how many units survive a losing streak.
Free vig calculator. Enter both sides of a two way market to find the sportsbook vig, the total overround and each sides fair no vig probability.
Free no vig fair odds calculator. Strip the sportsbook margin from a two way market to get each sides true fair odds and no vig win probability.
Free hold percentage calculator. Enter both sides of a market to find the sportsbook theoretical hold, the share of every dollar wagered the book keeps.
Free break even win rate calculator. Find the win percentage you need to break even at any odds, and see your ROI at a target win rate.
Free round robin bet calculator. Turn your picks into every parlay combination of a chosen size, with total number of bets, cost and max payout.
Free teaser calculator. Move the spread or total in your favor across multiple legs, apply the teaser odds and see the adjusted lines and payout.
Free each way bet calculator. Enter fractional odds, place terms and stake to see the win and place returns of an each way horse racing or golf bet.
Free poker pot odds calculator. Enter the pot size and the bet to call to get your pot odds as a ratio and the break even equity you need to call.
Free poker outs calculator. Enter your number of outs to get the odds of hitting your draw on the turn, the river and by the river in Texas Holdem.
Free betting unit size calculator. Convert a bankroll and unit percentage into a dollar unit, then price any bet in units to keep staking consistent.
Yes. Every betting & odds tool on yourhack.ai is completely free, with no sign-up and no usage limits.
Yes. They run in any modern web browser on phone, tablet or desktop. There is nothing to install.
Yes. These tools run entirely in your browser, so nothing you enter is uploaded to a server.
There are currently 20 free betting & odds tools here, and we add more regularly.