Punch in any bonus and its rollover. The machine tells you the real cost of clearing it - and whether the bonus is worth your time.

The Wagering Cruncher turns a bonus offer into the real turnover it costs you. You enter the bonus amount, the wagering multiplier, and whether the requirement applies to the bonus only or the deposit plus bonus. The tool returns the total stake you must put through and an estimate of the expected cost of clearing it, so a headline offer becomes a number you can actually judge.
A wagering requirement is how many times you must bet the bonus value before winnings become withdrawable. A "100% up to £100 with 35x wagering" offer is not £100 of free money; it is £100 of bonus that demands a large amount of turnover first. The multiplier, and what it applies to, decide whether the offer is worth taking at all.
Total turnover equals the qualifying amount times the multiplier. On a bonus-only 35x term, a £100 bonus needs £3,500 of bets; on a deposit-plus-bonus term, the base is larger and so is the turnover. The expected cost of that turnover is roughly the total stake times the game's house edge, which is why game weighting and edge matter as much as the multiplier.
Watch for max-bet-while-wagering rules, game contribution weightings that make slots count fully but table games barely count, short expiry windows, and caps on what you can win from a bonus. Any one of these can turn a generous-looking offer into a poor one. The Cruncher prices the turnover; the terms decide whether that turnover is realistic.
If the expected cost of clearing is close to or above the bonus value, the offer is marketing rather than value. Prefer low or wager-free terms, and remember a smaller no-wagering offer often beats a big heavily-wagered one. To compare real UK welcome offers, see the high roller bonuses guide; to understand returns on losses instead, read the cashback guide.
Whether wagering applies to the bonus alone or to the deposit plus bonus is the difference between a fair offer and an expensive one. On a bonus-only term, a £100 bonus at 35x needs £3,500 of turnover. On a deposit-plus-bonus term, the same headline can demand far more, because your own deposit is folded into the base. Always check which model a term uses before you judge the rate.
The Cruncher lets you switch between the two so you can see the turnover jump for yourself. A modest multiplier on a deposit-plus-bonus term can be worse than a higher multiplier on a bonus-only one, which is why the multiplier alone never tells the whole story.
Wagering rarely counts every game equally. Slots usually contribute 100%, while table games and live casino often count for a fraction or nothing at all. If you clear a slots-weighted bonus on blackjack, you may barely move the requirement while your balance drains. Read the contribution table, and clear on the games that actually count.
The practical result is that a bonus advertised as flexible can be far more restrictive than it looks. A term that only really clears on high-edge slots costs more expected money than the same turnover on a low-edge game would.
Run the numbers before you opt in. If the expected cost of clearing approaches the bonus value, the offer is marketing rather than money, and you are often better off declining it and keeping withdrawal freedom. Many experienced players skip bonuses entirely on that basis and treat any wager-free extra as the only kind worth taking.
A no-wagering offer is the honest end of the market: winnings are withdrawable without turnover, so the headline figure is close to its real value. These are usually smaller than heavily-wagered offers, and they are usually the better deal. To compare real UK welcome offers side by side, see the high roller bonuses guide.
The quick test is to run your offer through the Cruncher, note the total turnover, and multiply that turnover by the house edge of the game you plan to clear it on. If that expected cost eats most of the bonus, decline it. If it is small next to the bonus value, and the max-bet and expiry rules are livable, the offer is worth taking. That one calculation separates a real promotion from a marketing line, and it takes less time than reading the fine print twice.