Seven tools that do the sportsbook math for you. Everything runs locally in your browser — no data leaves your device. -110 = 1.91 = 10/11 = 52.38%, every time.
Enter odds in any format — get all three plus the implied probability.
What win chance is the market actually assigning at this price?
Stake in — profit and total return out.
Add each leg's odds — see the true combined price before you lock it in.
Size your bet to your edge. Be honest about your win probability — Kelly punishes optimism.
Enter both sides of a two-way market — see the book's hold and the true no-vig price.
Holding a ticket and want to lock profit — or think two books have left an arb on the table? Enter both sides' prices and find out.
Monte Carlo: run thousands of simulated seasons at your win rate and price to see how a bankroll actually behaves — the losing streaks included. This is a model, not a prediction.