Arbitrage calculator.

Odds converter

Type odds any way you have them. We show the other formats and the win chance they imply.

No-vig fair odds

Take the book cut out of a two-way market to see what each side is really worth.

Hold calculator

How much the book keeps on a market. Lower is better for you. Leave side C empty for two-way markets.

Parlay calculator

Every leg has to win. Add up to 10 legs.

Hedge calculator

Already have a bet open? See how much to bet on the other side so you get the same result either way.

Arbitrage calculator

Two books disagree enough that betting both sides wins either way. Enter both prices and your total.

Bonus bet converter

A bonus bet only pays the winnings. Hedge the other side with cash to lock in part of it.

Want us to find the best spot for it? Open the bonus bet finder.

Profit boost

A boost raises your winnings, not your stake. Add the fair price (from the no-vig tool) to see if it is worth taking.

Second chance bet

Lose and the book gives your stake back as a bonus bet. Most people turn a bonus bet into 60 to 75% of its value.

Kelly stake sizer

Your win chance against the odds. We use quarter Kelly on every pick.