RTP & Expected-Value Calculator

Return to player (RTP) is the percentage of all wagers a game pays back over the very long run. A 96% pokie returns A$96 for every A$100 staked on average across millions of spins — but a single session of yours might look nothing like that. This calculator shows the difference between the textbook average and the messy reality.

Tell it your stake per round, how many rounds you'll play and the game's RTP, and it estimates your expected return or loss, then simulates thousands of sessions to map the realistic range you could actually finish in — from a hot run to a cold one.

Expected return is the average amount you'd have back at the end across thousands of runs; subtract it from your total stake to read the expected loss. The realistic range is the band most sessions fall into — and on a short, high-volatility session it's wide, often spanning anywhere from near-zero to well above your stake. The key insight: the fewer spins you play, the further your real result drifts from the headline RTP. RTP is a long-run average, not a session promise.

RTP, house edge and volatility

RTP and house edge are two sides of one coin: a 96% RTP is a 4% house edge. That 4% is the game's long-run cut of everything wagered, and it's baked in — it doesn't warm up, cool down, or owe you a payout after a dry spell.

Volatility is the missing third piece. Two games can share a 96% RTP but feel completely different: a low-volatility pokie pays small and often, hugging the average; a high-volatility one pays rarely and large, so most sessions sit below average while a few rocket past it. RTP tells you the destination over millions of spins; volatility tells you how rough the road there is.

This is why your friend's big win and your flat session can both come off the 'same' 96% game. Neither contradicts the RTP — they're just two points in a very wide range that only averages out over numbers no one plays in a lifetime.

Why short sessions defy the average

The law of large numbers only kicks in over enormous samples. A few hundred spins is statistically tiny, so your result is dominated by variance, not RTP. Stake A$100 over 200 spins on a 96% game and the 'expected' A$96 return is almost the one figure you won't see — you'll land above or below it, sometimes by a wide margin.

That's not a flaw; it's the whole appeal. The gap between the average and any single session is where the wins and losses live. But it also means you can't bank on RTP to protect a short session — over a handful of spins, a 96% game and a 94% game feel nearly identical, swamped by luck.

Use the realistic range as your reality check. If the worst-case end of the band is more than you're willing to lose, the answer isn't to hope for the best end — it's to lower your stake or shorten the session.

Worked example: A$100 over 200 spins

You plan to stake A$0.50 a spin for 200 spins on a 96% RTP pokie — A$100 of total stake. The expected return is A$100 × 0.96 = A$96, for an expected loss of A$4 — that's 4c on every A$1 staked, totalling about A$4 over the session.

That A$4 average, though, is the least likely single outcome. The simulation spreads the realistic range wide: plenty of sessions finish down A$30–A$50 after a cold run, while others end up ahead if a feature lands, all averaging to that −A$4 over enough repeats. On a higher-volatility game the band stretches further still. The takeaway: budget for the lower end of the range, treat anything better as a good night, and never mistake the −A$4 average for what 200 spins will actually do.

Glossary

RTP

Return to player — the percentage of all wagers a game pays back on average over the very long run, e.g. 96%.

House edge

The casino's built-in mathematical advantage, equal to 100% minus the RTP, taken as an average across everything wagered.

Volatility

How swingy a game is — low volatility pays small and often, high volatility pays rarely but large for the same RTP.

Wagering requirement

The total turnover you must bet before bonus funds and their winnings become withdrawable cash, shown as a multiple like x35.

Expected value (EV)

The average outcome of a bet or offer across thousands of repeats — positive means it favours you on average, negative means it costs you.