Casino tools

What casino calculators can and cannot tell you

Casino calculators convert the published terms of a bonus or game into an average cost, so you can compare offers on one scale instead of by headline size. They show expected values: the average over a very large number of bets, not the next session.

That average is reliable because casino maths is fixed: turnover multiplied by house edge gives the expected cost of a bonus. What no calculator can predict is variance, so a short session can end well above or below the average.

Which casino tool to use when

Choose the tool by your question: bonus value, game cost, licence status, or which casinos fit your country.

• Wagering calculator: total turnover, number of bets and expected value of a bonus.
• RTP and house edge calculator: house edge and expected loss for your stake and session length.
• Casino licence checker: the official register for each regulator and what a valid entry shows.
• Casino finder: casinos that accept your country, filtered by payment, licence, payout speed and wagering.

A quick example of the numbers

The same bonus can be worth something or cost you money depending on the multiplier. Take a 100 bonus with wagering on the bonus only, played on a slot with 96 % RTP: at 35x you must bet 3,500 and the expected cost is 140, so the offer is worth −40 on average. At 10x, turnover falls to 1,000, the cost to 40 and the average value rises to +60.

In Great Britain, the Gambling Commission capped wagering requirements in promotional offers at 10 times from 19 January 2026. House edge also differs by game: the Wizard of Odds gives 2.70 % for single-zero roulette and 5.26 % for double-zero roulette. Our guide to wagering requirements explains the terms.

How the tools are built

The calculators use the standard formulas shown on each tool page; the finder reads its data from our casino reviews, where licences are checked against registers and terms are read in full, as described in how we rate casinos.

A calculator result is an average, not an amount to win back; if you use it to plan a budget, set a deposit limit as well, as our responsible gambling page explains.

Frequently asked questions

Are casino calculators accurate?

The formulas are exact for averages, but a single session can differ widely from the average. Accuracy also depends on your inputs, so copy RTP, multiplier and game weighting from the game and the bonus terms rather than estimating them.

Do the casino tools store my data?

No. The calculators run in your browser and do not save what you enter. The casino finder keeps your filters in the page address so you can bookmark or share a search, but it does not create an account or keep a history of searches.

Can a casino calculator help me win?

No. A calculator shows what a bonus or game costs on average; it cannot change the house edge or predict results. It helps you avoid offers whose wagering costs more than the bonus and choose games that take less per hour.

What is a good wagering requirement?

Lower is better, and the base matters as much as the multiplier: 10x on the bonus only means far less betting than 35x on deposit plus bonus. Enter both versions in the wagering calculator to see the difference in turnover and expected value before you accept an offer.

Sources: Gambling Commission: socially responsible incentives consultation response, Wizard of Odds: house edge