Casino math tool
RTP Calculator
Put two RTP percentages next to the same wagered volume and make the theoretical cost gap visible.
Game A expected cost
$40.00
Game B expected cost
$60.00
Theoretical gap
$20.00
Game A return
$960.00
Game B return
$940.00
This compares theoretical long-run averages only. It cannot predict a session, account for volatility, or prove that a game’s stated RTP is accurate.
Long-run math
RTP and the house edge
Per $100 wagered
These are theoretical long-run averages, not a promise about a single session. The lower the RTP, the more the same volume costs over time.
What the calculator does
It multiplies total amount wagered by each RTP percentage to estimate the theoretical return, then shows the difference between total wagered and that return as the theoretical cost. A 96% RTP and a 94% RTP are only two percentage points apart, but over $10,000 of volume the theoretical cost gap is $200.
That is not a promise about what you personally receive. RTP is a long-run average; volatility, game rules, strategy, bonuses, fees, and the number of rounds all shape the actual experience. For the explanation behind the number, read Why RTP Actually Matters.
What is RTP?
Return to Player is the theoretical percentage of wagered money a specific game is designed to return over a very large number of plays. It is not the amount you should expect back in one session.
How does RTP relate to house edge?
For a simple RTP calculation, house edge is 100% minus RTP. A 96% RTP corresponds to a 4% theoretical house edge.
Does a higher RTP guarantee a better result?
No. A higher RTP lowers the theoretical long-run cost, all else equal, but it does not predict your next spin, hand, or session and it does not remove game volatility.