RTP Calculator: Work Out a Slot’s Theoretical Return
Use this free calculator to see what a slot really returns over the long run. Enter a game’s RTP (Return to Player), your stake per spin and how many spins you plan to play, and it works out the theoretical return, the average amount the game keeps, and the house edge.
RTP calculator
Enter a game's RTP and how you play to see the theoretical, long-run return and what the game keeps on average. These are not a prediction of any single session.
18+ - Slots are games of chance; outcomes can't be predicted or guaranteed. Please gamble responsibly - GambleAware.org
A high RTP means a game returns more of all money staked over the long term – it does not tell you whether you will win in any single session. How often a slot pays is its volatility, not its RTP, and no result is ever guaranteed.
How the calculation works
RTP is the percentage of total stakes a slot is designed to pay back across hundreds of thousands of spins. Stake C$500 on a 96% RTP slot and the theoretical return is C$480, with the game keeping C$20 on average over the long run – that is the house edge. Real sessions vary widely around that average, in both directions.
Where to check a slot’s RTP
The most reliable place is the game’s own help or paytable screen, usually behind an information icon or a “game rules” link. Check there rather than trusting a number quoted elsewhere, because plenty of slots ship in more than one RTP version and the operator decides which one to run. The same game can pay back 96% at one casino and noticeably less at another. Where a third-party listing and the in-game help screen disagree, the help screen in the game you are actually playing is the one that counts.
RTP, volatility and session length
RTP tells you how much a slot returns over time; volatility tells you how that return arrives. A high-volatility slot with a 96% RTP pays less often but in bigger amounts, so short sessions swing further from the average in both directions. A low-volatility game at the same RTP feels steadier. Neither is better value – they are the same theoretical return delivered differently, and the shorter your session, the less the RTP figure predicts what you will actually see.
Does a higher RTP mean I will win?
No. A higher RTP means a slot returns more of the total amount staked over the long run, but it is not a measure of your chance of winning a session. You can still lose on a high-RTP slot, and a win is never guaranteed.
How is a slot’s RTP calculated?
RTP is the total amount a game returns divided by the total amount staked, measured over a very large number of spins – often hundreds of thousands or millions. It is a long-run theoretical figure, not a per-session one.
How many spins is RTP based on?
RTP is a theoretical average over an extremely large number of spins, far more than anyone plays in a single session. Over a short session your actual return can be much higher or much lower than the stated RTP.
What is the house edge?
The house edge is 100% minus the RTP. On a 96% RTP slot the house edge is 4%, meaning the game keeps about C$4 of every C$100 staked on average over the long run.
Can the same slot have different RTP settings?
Yes. Many studios release a game in several RTP configurations and the casino chooses which to run, so the same title can differ between sites. Always check the RTP shown in the game’s help screen at the casino you are playing at.
Compare the games we track, with RTP listed on every card, on our online slots page.
19+ in most provinces (18+ in Alberta, Manitoba and Quebec). Gambling is a game of chance and results cannot be predicted or guaranteed. Please play responsibly – see our responsible gambling guide.