Free tools
Betting Calculators
Free calculators for arbitrage, expected value, odds conversion, and every other calculation a serious bettor needs.
Arbitrage Calculator
Find guaranteed profit when odds create an arbitrage opportunity.
Expected Value Calculator
Measure the edge on any bet using fair probabilities.
No-Vig Calculator
Strip the bookmaker margin to find true fair odds.
Kelly Criterion Calculator
Size bets optimally based on your edge and bankroll.
Odds Converter
Convert between decimal, American, fractional, and implied %.
Hedge Calculator
Lock in profit or minimize loss on an existing position.
Matched Betting Calculator
Extract value from free bets and promotions risk-free.
CLV Calculator
Measure how often you beat the closing line.
Parlay Calculator
Calculate parlay payouts across any number of legs.
Free Bet Calculator
Find the best way to convert a free bet token into cash.
Middle Calculator
Identify middling opportunities between two lines.
Hold Calculator
Calculate the bookmaker hold on any market.
Bookmaker Margin Calculator
Measure the overround embedded in any set of odds.
Stake Splitter
Split a total stake optimally across multiple outcomes.
Account Lifespan Estimator
Estimate how long a soft book account will remain active.