Methodology
Every live calculator shows its inputs, formula, and what the output is not. This page is the sourcing contract those tools cite.
Principles
- Show the math. Tools print the formula next to the result, including units (currency, spins, or playthrough multiple).
- Name the assumptions. Game contribution, wagering multiple, stake, and RTP are inputs you provide or we label as examples — not scraped operator promises.
- No unsourced operator claims. We do not publish a casino’s RTP, bonus, or licence status unless there is a cited source and a review path. This site currently publishes none of those claims.
- Education, not prediction. Expected value and house edge describe long-run statistics. They do not forecast a session.
What we calculate
- Wagering playthrough = bonus amount × wagering multiple ÷ contribution rate. Live on the wagering requirement calculator— optional max-bet and expiry fields estimate minimum bets and stake-per-day; they do not change the playthrough total.
- Bonus true value: bonus after any cap, effective turnover at the contribution rate, then expected wagering cost = effective turnover × (1 − RTP). Live on the bonus true-value calculator. This is a long-run statistical estimate of stated terms, not a session prediction or a profit promise.
- House edge = 1 − RTP, for a stated RTP input. Expected cost = stake volume × house edge. Live on the RTP and house-edge calculator.
- Contribution-adjusted turnover = gross wagering ÷ contribution rate. Live on the game contribution calculator.
- Implied daily stake = remaining playthrough ÷ days. Live on the bonus expiry planner. Explanation only — not a schedule to chase.
- Session spend cap = the smaller of entertainment budget and loss limit. Live on the safer-play budget planner. Outputs are limits, not targets.
- Seeded two-outcome teaching model with mean return equal to the stated RTP. Live on the RTP vs variance simulator. Not a game and not a prediction.
- Side-by-side expected cost of two user-typed term sheets. Live on the bonus terms comparison. Not a bonus database.
- Fee and optional conversion on numbers you type. Live on the payment fee calculator. No payment-method table.
- Hourly cost = stake × house edge × rounds per hour. Live on the hourly cost of play calculator. A long-run average at the pace you type, not a session forecast.
Worked examples use round numbers so you can reproduce them with a calculator. If a later data source disagrees with an example, the example stays labeled as an example.
Corrections
If a formula or label is wrong, use the contact page. We would rather ship a narrower tool than a confident one with hidden terms.