Betting Tools
Free calculators for the math behind every bet — the same numbers our model runs before it flags a play.
Odds & Pricing
Convert prices, strip the vig, and find the fair number.Odds Converter
Convert American, decimal, and fractional odds — and see the implied probability behind any price.
No-Vig & EV Calculator
Strip the vig to find the fair price, then check the expected value of any bet against your own win probability.
Hold & Margin Calculator
Measure a sportsbook’s margin on any 2-way or 3-way market and see the fair, vig-free price on each side.
Bet Sizing & Risk
How much to bet — and how to lock or arb a position.Kelly Criterion Calculator
Size your bet to your edge — enter the odds, your win probability, and bankroll for the optimal full, half, or quarter Kelly stake.
Hedge Calculator
Find the hedge stake that locks the same profit on either outcome of a bet — handy for futures tickets and live bets.
Arbitrage Calculator
Check two books for a risk-free arb and get the exact stake split that locks it in whichever side wins.
Payouts & Returns
What a bet pays, and the win rate it needs to profit.Parlay Calculator
Add your legs and get the combined odds, total payout, and profit on a multi-leg parlay.
Bet Payout Calculator
Enter a stake and odds to instantly see your profit, total payout, and the win probability the price implies.
Break-Even Calculator
See the exact win rate any price needs just to break even — and whether your own win rate clears the bar.
Want the math done for you on real games? Our model calculates the true line for every game we model (WNBA, MLB, CFB, NFL, and NBA) and grades every pick in public on the scoreboard.