Casino and betting calculators
The maths behind the small print. Each tool shows its formula, so it works even with scripts switched off.
What each tool answers
The wagering calculator answers the question an offer card cannot: how much you have to bet before a bonus becomes money you can withdraw, and what all that betting is likely to cost at a given return to player. Enter the bonus, the deposit, the wagering multiple, what the multiple applies to and how much your game counts, and it sets the total bets and the expected cost next to the bonus itself.
The odds converter is for bettors who meet the same price written three different ways. It turns decimal, American and fractional odds into one another and into the implied probability, the chance a bet has to beat before the price is worth taking.
The parlay calculator multiplies up to 12 legs into one combined price and shows the payout, the profit and the implied chance that every leg wins, so you can watch that chance shrink with each leg you add.
How the tools work
Every calculator runs in your browser. The numbers you type are not sent to us or stored anywhere, and there is nothing to sign up for. Each page also prints its formula and a worked example as plain text, so the maths can be checked by hand and still reads with scripts switched off. Results are plain numbers in whatever currency you work in; the tools never convert one currency into another.
What they cannot tell you
A calculator shows the maths of a price or a bonus term, not the outcome of a bet or a session. Expected cost is an average over a very long run, and one evening can end far above or below it. Bonus terms change, so take the inputs from the casino's current terms; our offer cards show the date each set of terms was read, which tells you how fresh a figure is before you rely on it.