Written to be read rather than skipped.
This site is educational. It exists to explain how slot machine mathematics works, using simulations, so that people can understand what a payback percentage does and does not mean.
Every spin outcome on this site comes from a random number generator running representative paytables written for demonstration. They are not the mathematics of any real game, manufacturer or property, and no real machine's behaviour can be inferred from them. Results shown are illustrative and will differ every time you run them.
Where this site links to casino operators, regulators or reference sources, those sites are not under our control. We do not endorse them and are not responsible for their content, their accuracy, their privacy practices or anything that happens to you there. Links to operators are provided as directory information only.
Payback percentages shown for real venues are taken from figures published by gaming regulators. Nevada figures come from the State Gaming Control Board, which reports by geographic area rather than by individual property. Connecticut figures come from the state, which receives them under the tribal-state compacts.
Three limits on those numbers, stated plainly because the site would be misleading without them:
Bet configurations and credit ladders shown are representative examples, not sourced from any operator. Casino directory entries are compiled from public sources and go out of date as properties open, close and rebrand.
We make no warranty that any figure on this site is current, complete or correct, and accept no liability for decisions made in reliance on it.
This site is intended for adults and is not directed at children. It collects nothing from anyone, of any age, which is covered in the privacy notice below.
Gambling age minimums vary. Most US jurisdictions set 21 for casino gambling; some tribal and charitable venues set 18. Nothing on this site should be taken as permission to gamble anywhere, at any age, and the legality of gambling where you live is your responsibility to establish.
Who is responsible. Dad Who Games, operator of dadwhogames.com. Contact info@dadwhogames.com. Under GDPR terminology this is the data controller. This is a personal, non-commercial site with no business premises, so correspondence is by email.
| Data | Why | Basis | Kept |
|---|---|---|---|
| Server access logs (IP address, time, page, user agent) | Serving the page and protecting against abuse | Legitimate interests | About 30 days, then rotated by the host |
| Your cookie choice | Not asking you again on every page | Strictly necessary | 180 days |
| IP address sent to Google's font service | Loading the typefaces the pages are set in | Legitimate interests — see the note below | Google's retention, not ours |
Depending on where you live you may have rights to access, correct, delete, port or restrict processing of your personal data, to object to processing, and to complain to a supervisory authority. Californians additionally have rights to know, delete, correct and to opt out of sale or sharing. We do not sell or share personal information, and there is no such thing as a targeted advertising profile of you here.
To exercise any right, contact info@dadwhogames.com. In practice, because we hold almost nothing about you, most requests can be answered by pointing at this page. If we cannot identify you in our records we will say so rather than ask you for more data in order to find you.
Global Privacy Control is honoured. If your browser sends that signal, every optional category is switched off before you arrive and you are not asked again.
By using this site you accept these terms. If you do not accept them, stop using it.
You may read, use and share this site for personal, educational and non-commercial purposes. You may not scrape it at a rate that degrades service, present it as your own, or use it to promote gambling products.
The site is provided as is and as available, without warranty of any kind, express or implied, including fitness for a particular purpose and accuracy. We do not warrant uninterrupted or error-free operation.
To the fullest extent permitted by law, we are not liable for any loss arising from use of this site, including gambling losses, lost profits or consequential damages. Nothing excludes liability that cannot lawfully be excluded, including for death or personal injury caused by negligence, or for fraud.
Some jurisdictions do not allow certain exclusions, so parts of this may not apply to you. Consumer protection law in the EU and UK limits how far a site can disclaim liability to consumers regardless of what its terms say.
Original text, code and design are © 2026 Dad Who Games. All rights reserved. Casino directory data derived from Wikipedia is used under CC BY-SA 4.0 and carries that licence with it, which means derivative datasets must be shared alike and attributed. Regulator statistics are government-published facts. Operator names and marks belong to their owners and appear here descriptively, not as endorsement.
These terms are governed by the laws of the State of Texas, United States, and by applicable US federal law. The state and federal courts located in Texas have exclusive jurisdiction over any dispute, without affecting any mandatory consumer rights in your place of residence.
We may update these terms. Material changes will be reflected in the date at the top of this page. Continued use after a change means acceptance.
Gambling is entertainment with a price. Every game described on this site returns less than it takes, over time, by design. That is not a flaw in the machine and no amount of skill, timing or bankroll management reverses it.
United States. The National Problem Gambling Helpline is free, confidential and available 24/7: call or text 1-800-GAMBLER (1-800-426-2537), or chat at 1800gamblerchat.org.
Elsewhere. Search for your national gambling helpline, or contact Gamblers Anonymous at gamblersanonymous.org.
Self-exclusion. Most US states and tribal gaming authorities run voluntary self-exclusion programmes that bar you from casinos in that jurisdiction. Contact your state gaming board or the tribal gaming commission for the property.
We are not clinicians and this page is not a substitute for professional support.