Implied Probability & Break‑Even Calculator
Convert betting odds into their implied probability and the win percentage needed to break even. Select the odds format and enter the price to see results.
No‑Vig Odds
Remove the sportsbook margin (vig) to find the fair probabilities and odds for each outcome. Enter the odds for each of two outcomes using the selected format.
Expected Value & Kelly Criterion
Compute the expected value of a bet based on your own win probability and stake. You can optionally calculate a Kelly Criterion stake recommendation.
Closing Line Value (CLV) Tracker
Track how your bet's odds compare to the closing line. Enter your bet odds and the closing odds to compute the CLV percentage, which indicates whether you beat the market price.
Parlay True Probability
Calculate the true probability of a parlay by multiplying the win probabilities of each leg. Compare the fair parlay probability and odds to the sportsbook payout. Legs are assumed independent.
Line Efficiency (Reward‑to‑Risk)
Evaluate the risk‑reward profile of a single bet. Enter the posted odds and an optional stake amount to calculate the potential profit per dollar risked and the line efficiency score, which relates the potential reward to the break‑even win probability implied by the odds.