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Implied probability
Convert American odds into probability, decimal and fractional formats, profit, and total return.
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Calculate the price before you compare the bet
Convert odds, remove margin, evaluate expected value, and plan multi-bet scenarios with transparent formulas and no signup.
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Six tools, one clear workflow
Every result shows what the number means and where the estimate can break down.
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No-vig probability
Normalize both sides of a two-way market to estimate fair probability and remove the displayed hold.
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Expected value
Combine your win-probability estimate, price, and stake to calculate average expected profit or loss.
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Round robin
Count component parlays, total risk, and estimated all-win and one-loss payout scenarios.
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Bonus bet conversion
Estimate a hedge, locked cash amount, and conversion rate for a stake-not-returned bonus bet.
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Arbitrage
Check two opposite prices and calculate the stake split needed to equalize the theoretical return.
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Start with implied probability so every odds format speaks the same language.
Convert odds →Estimate fair probability
Remove the displayed margin from matching outcomes with a clearly stated normalization method.
Remove the vig →Test your assumption
Compare your probability estimate with the offered payout and calculate expected value.
Calculate EV →