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Slot machine simulator
Most slots hide their reel strips. This one shows everything: every symbol on every reel, the paytable, and the exact RTP your browser computes from all 10,648 reel stop combinations. Spin it, run 1,000 spins and see how hit frequency and volatility shape the ride.
Slot Machine Simulator
Play moneyExact figures, computed in your browser from every one of the 22 × 22 × 22 = 10,648 reel stop combinations.
Press Spin.
Biggest win: –
Paytable (× line bet, three in a row on a line, left to right)
| Combination | Pays | Chance / line | RTP share |
|---|
Reel strips (stops per symbol, 22 per reel)
| Symbol | Reel 1 | Reel 2 | Reel 3 |
|---|
Play money only. A demo machine built for this page, not a copy of any real game. Reel stops use crypto.getRandomValues, one of 22 equally likely stops per reel. Real slots publish their RTP in the game's info screen, usually between 94% and 97%.
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Slot RTP explained
RTP (return to player) is the share of all money wagered that a slot pays back over its full cycle. It is a fixed property of the reel strips and paytable: RTP = sum over every winning combination of (probability × payout). This demo has 22 stops on each of three reels, so there are 22 × 22 × 22 = 10,648 equally likely outcomes. Adding up the payouts of all of them gives 96.04%, which the page computes live when it loads.
The paytable shows where that 96% comes from. Seven-Seven-Seven pays 500× but lands once in 10,648 spins, adding 4.70%. The humble any-three-BARs combination adds 26.5%, and a single cherry on reel one adds 23.6%. Small frequent wins carry most of the RTP; the jackpot is a small slice.
Hit frequency is not RTP
Hit frequency is how often a spin pays anything. On one payline this machine hits 20.2% of the time. Switch to five lines and it hits about 60% of spins, but most of those are wins smaller than the total bet, such as one cherry paying 2× a fifth of your stake. The RTP stays exactly the same; you just get more small returns.
Slot volatility
Volatility describes how far results swing around the average. The simulator measures it with the standard deviation of one spin, in multiples of the bet: 5.86 on one line and 2.62 on five lines. Higher numbers mean longer dry spells and bigger occasional wins.
Volatility also tells you how long the house edge takes to show. The standard error of observed RTP is the standard deviation divided by the square root of spins. With 5.86 per spin, 1,000 spins leave a ±18.5-point spread; 100,000 spins narrow it to ±1.85. Modern video slots with 10,000× top wins often have standard deviations above 15, so short sessions are mostly luck.
- Low volatility: frequent small wins, slow steady loss.
- Medium volatility: a mix, like this machine on one line.
- High volatility: long losing runs, rare large hits, very wide session results.
Choosing a real slot
Check the RTP in the game's info screen. Many popular slots exist in several versions such as 96%, 94% and 92%, and the casino picks which one you get. A 4-point RTP difference costs $4 per $100 wagered. Free spins and rakeback do not change a slot's RTP, but they add value on top of it.
FAQ
Slot Machine Simulator questions
What does 96% RTP mean on a slot?
Over a very large number of spins the slot pays back 96% of the money wagered. Over a single session the result can be far above or below that, depending on volatility.
Are online slots rigged?
Licensed slots use certified random number generators and published RTPs. They are designed to lose 3–6% of what you wager over time, which is the house edge, not rigging.
What is slot volatility?
Volatility is how much results swing around the RTP. High-volatility slots pay rarely but big; low-volatility slots pay small amounts often. Both can have the same RTP.
Is a high hit frequency better?
Not by itself. A slot can hit on 60% of spins and still return less than one with a 20% hit rate, because many hits pay less than the bet.
Do slots get hot or due to pay?
No. Each spin is independent with fixed reel stop probabilities. A slot that has not paid for a while is not more likely to pay next.
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