Wagering calculator
A wagering requirement tells you how much you must stake before bonus winnings become withdrawable. Put the numbers in and see what it actually costs.
Wagering requirement, sometimes called a rollover or a playthrough, is the total amount you must stake before winnings linked to a bonus can be withdrawn as cash. It is usually expressed as a multiple, such as 35x, applied either to the bonus amount alone or to the bonus plus your own deposit, depending on the operator's terms.
The calculator above does the arithmetic operators rarely spell out on the promotions page itself: multiply the amount wagering applies to by the multiple, and you get the total stake required. A £20 bonus at 35x wagering on the bonus alone means £700 must be staked in total before any winnings become withdrawable — not £20 more spent, but £700 cycled through games, win or lose.
Use the toggle to see how the total changes when wagering applies to your deposit as well as the bonus, since operators differ on this point and it can roughly double the total stake required. Always check the operator's own terms for which basis applies to a specific offer; this tool is for working out the arithmetic once you know the multiple, not for telling you what a given operator's terms say.
The figure the calculator shows is unweighted, meaning it assumes every £1 staked counts fully towards the requirement. In practice, many operators apply game weighting, so that a slot might count 100% of a stake towards wagering while a table game counts far less, sometimes as little as 5-10%. That means clearing the same wagering total can take substantially more real money staked if you play a low-weighted game, which is worth checking before you assume a multiple is affordable simply because you plan to play cautiously.
How to read the result
The total stake is simple multiplication: a £50 bonus at 35x means £1,750 of bets before anything converts. The expected cost is what that volume of play typically loses at the game's published return-to-player, and it is the number the headline never mentions.
When the expected cost is higher than the bonus, the offer is worth less than nothing in expectation. That is why we weight bonus fairness at 40% of every score, and why a small wager-free offer beats a large one with strings attached.
Two things this cannot model: game weighting, where table games contribute a fraction of each stake, and maximum conversion caps. Both make a bonus worse, never better. Check the operator's own terms.