Compare n' Bet™
Compare n' Bet™
Free tools for running the numbers before you place a bet. Convert odds between formats, calculate parlay payouts, strip the vig from a line, size bets with Kelly, hedge to lock in profit, and check if a cross-book opportunity is a real arbitrage.
Convert between American, decimal, fractional, and implied probability. The starting point for understanding what any price actually means.
Combine 2 to 12 legs and see the true combined odds and payout. Useful for cross-book parlays your sportsbook slip can't build.
Strip the sportsbook's margin out of a two-way market to see the implied fair probability. The math behind +EV betting.
Figure out the mathematically optimal stake size given your bankroll, estimated win probability, and the offered price. Includes fractional Kelly options.
Given an existing open bet, calculate the hedge stake that locks in equal profit on both outcomes or the stake that guarantees you break even.
Spot a guaranteed-profit opportunity between two sportsbooks. Enter two opposing prices and get the required stake split and guaranteed return.
These tools exist because a lot of important sports betting math is not shown to you by the sportsbook. A bet slip will calculate your payout, but it won't tell you the implied probability the price represents, what the fair no-vig odds would be, or whether the hedge you're considering actually locks in a profit.
Pair these with the free sports betting guides to understand not just how to run the numbers, but why they matter. The expected value guide, line shopping guide, and bankroll management guide are good starting points.
None of these calculators give betting advice. They run math. What you do with the output is your decision, and Compare n' Bet does not tell users what to bet or recommend any particular sportsbook.
These calculators are for informational purposes only. Compare n' Bet does not provide betting advice, guarantees, or predictions. Sports betting involves risk of financial loss and should be approached responsibly. If you or someone you know has a gambling problem, call 1-800-522-4700 or visit ncpgambling.org.