Is this bonus worth taking? A 200% match at 60x wagering is worth less than a 50% match at 20x, and the advertised percentage is the number least able to tell you which is which.
Before claiming an offer, and before choosing which game to clear it on — game weighting changes the answer more than the wagering multiplier does. It works on any offer, not only the ones listed on this site: type the terms in from wherever you found them.
Deposit bonus, no deposit, free spins or cashback. This decides what the rest of the form asks for, because the four are priced differently — a no-deposit bonus has no deposit to match, and cashback runs the arithmetic backwards.
Deposit mode only. The amount you intend to put in, and the percentage the casino adds. The bonus in money is shown under the field as you type.
No-deposit and cashback mode: the credit itself, since there is no deposit to calculate it from.
Free spins mode. Spin value is the stake per spin the terms fix, usually 0.10 or 0.20. Fifty spins at 0.20 is ten euros staked, and worth slightly less than that in return.
The multiplier from the terms, entered as a number: 35x is 35. Enter 0 if there is no playthrough, which is worth checking on cashback — cash cashback with no wagering is a genuinely different product.
Bonus only, deposit plus bonus, or winnings. The second doubles the real requirement on a 100% match and is the term most often skimmed past.
Game weighting. Slots usually count 100%, table games and live casino often 10%. Clearing 35x on a game weighted at 10% means staking 350 times the bonus, which is why this field changes the answer more than any other.
The return to player of the game you will clear on, from its own page. This is what turns turnover into an expected cost — without it the tool could only tell you how much to stake, not what staking it loses.
What you will bet each spin or hand. Only affects how many bets the turnover works out to, which is the honest measure of how long clearing will take.
The ceiling the terms put on withdrawals from the bonus. Enter 0 if uncapped. A large bonus with a small cap is a small bonus, and this is where that becomes visible.
The money that must actually go through the game, after game weighting is applied. Higher than the figure in the terms whenever you play anything weighted below 100%.
What staking that turnover loses on average, at the house edge of the game you chose. This is the number the offer never states and the one that decides whether it is worth taking.
The most the bonus can hand back once the cashout cap is applied. Where the cap bites, this is well below the bonus itself.
Realisable value minus expected cost. Negative for most offers, which is not a fault in the offer — it is what a bonus is. A positive net is rare and worth a second look at the terms for what you missed.
Turnover divided by your stake. The clearest measure of how much play the offer commits you to.