Slot Machine RTP Calculator

Analyze slot machine return to player, expected loss, variance, and probability of winning.

RTP is the percentage of wagered money returned to players over time. A 95% RTP means $95 returned per $100 wagered on average.
Typical slot play: 500-700 spins/hour. Video poker: 300-500. Fast auto-spin can reach 800+.

Slot Machine Analysis

RTP-
House Edge-
Expected Loss per Spin-

Session Estimates

Total Spins-
Total Wagered-
Theoretical Return-
Expected Loss-
Cost per Hour-

Variance Estimate

Std Deviation (session)-
Prob. of Being Ahead-
Lucky Range (+1 SD)-
Unlucky Range (-1 SD)-
References: Slot variance typically 5-15x bet per spin (SD). Probability calculations assume normal distribution approximation for large number of spins.