Slot Volatility Simulator
Play out a slot session at any RTP and volatility — and see how often a bankroll actually doubles or busts.
£100.00
spin 0/300
biggest win £0.00
Simulating 1,000 sessions…
The expected loss is fixed by RTP and turnover; volatility only moves the busts and the big wins further apart. At 96% RTP over 300 spins, most sessions finish below where they started.
Two slots can advertise the same 96% return to player and feel completely different to play. RTP only says how much of all money wagered is paid back over millions of spins; volatility says how that return arrives. A low-volatility game feeds back small wins steadily; a high-volatility game takes your balance down for long stretches and occasionally returns everything at once.
This simulator lets you set both. Each spin is drawn from a payout distribution whose average is exactly your chosen RTP, with the shape controlled by the volatility setting. Run a single session to watch a balance curve unfold, then run a thousand sessions to see the distribution: what fraction bust before a set number of spins, what fraction double, and where the middle outcome lands.
The lesson is usually the same. Even at a generous 96% RTP, a fixed number of spins at a fixed bet leaves most sessions down, because the house edge is relentless and the big wins that carry the average are rare. Higher volatility widens both tails — more busts and more big hits — without changing the expected loss.
FAQ
- Does a higher RTP mean I will lose less?
- On average, yes — over a very long run. In a single session variance dominates, so a 96% game and a 94% game can easily produce the opposite of what the RTP suggests. The edge only shows reliably over tens of thousands of spins.
- What does volatility actually change?
- The spread of outcomes, not the average. High volatility means longer losing runs punctuated by rarer, larger wins. Your expected loss per spin is RTP-driven and identical; only the ride changes.
- Is this a real slot machine?
- No. It is a statistical model with the same RTP and volatility characteristics as a real game, built to show the distribution of outcomes. It pays nothing and costs nothing.