Find out, before you claim a bonus, how much you'll need to wager to clear it — and whether it's actually worth it. Free, no signup.
When a casino gives you a welcome bonus, you usually can't withdraw it right away: first you have to wager it (or wager the bonus plus your deposit, depending on the operator) a set number of times. That multiplier is the wagering requirement, usually shown as ×20, ×30, ×40, and so on.
The calculator shows you the total betting volume you need to generate, and compares it with the statistically expected loss based on the RTP of the game you pick. If that expected loss is higher than the bonus itself, the bonus has a negative expected value: statistically it's not worth chasing for the bonus alone, even though it can still be a way to play longer with the same deposit.
Deposit of $100, 100% bonus up to $200, ×40 wagering on the bonus only, playing slots with 96% RTP: the bonus is $100, you need to wager $4,000 in total, the expected loss is $160, and the bonus's expected value is -$60.
It's the multiplier that shows how many times you must wager the bonus amount (or the bonus plus your deposit, depending on the operator) before you can withdraw winnings tied to that bonus.
Because clearing the bonus means wagering an amount far larger than the bonus itself, and on every bet the casino keeps, on average, the percentage set by the RTP. If that expected cost is higher than the bonus, the expected result is negative.
Not every game counts the same toward the wagering requirement: slots usually count 100%, while roulette and other table games usually count only a fraction (for example 10-20%).