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.

Measure the edge on any bet using fair probabilities.

Strip the bookmaker margin to find true fair odds.

Size bets optimally based on your edge and bankroll.

Convert between decimal, American, fractional, and implied %.

Lock in profit or minimize loss on an existing position.

Extract value from free bets and promotions risk-free.

Measure how often you beat the closing line.

Calculate parlay payouts across any number of legs.

Find the best way to convert a free bet token into cash.

Identify middling opportunities between two lines.

Calculate the bookmaker hold on any market.

Measure the overround embedded in any set of odds.

Split a total stake optimally across multiple outcomes.

Estimate how long a soft book account will remain active.