House edge is invisible during play — you don’t see it on any single bet. But over hundreds or thousands of rounds, it compounds into real money. This calculator shows exactly how much.
Set your bet size, playing speed, and session length. The tool computes your total wagered volume, then calculates the expected cost at each platform’s RTP. Platforms with daily zero-edge allowances (Duel, Gamdom) use blended math: volume within the cap at 0%, the remainder at the post-cap rate.
How to use this calculator
- Bet size: Your typical wager per round.
- Bets per hour: Dice and Crash can reach 120–600/hour. Blackjack and Mines are slower (60–120). Slots vary by speed setting.
- Hours per session: How long you typically play in one sitting.
- Timeframe: Session shows one sitting. Weekly/monthly/yearly assume one session per day at the selected duration.
- Platforms: Toggle any combination to compare. Duel and Gamdom include automatic allowance cap calculation.
What this calculator shows
The expected cost is a mathematical average — what the house edge costs you over a very large number of rounds. In any individual session, variance means your actual result will differ. You can win or lose significantly more than the expected cost. The key insight: at 100% RTP, the expected cost is $0, so variance is the only risk. At 96% RTP, you face variance plus a systematic $40 drain per $1,000 wagered.
Why allowance caps matter
Duel offers 100% RTP within a $50,000 daily wager cap. Gamdom offers 100% within ~$5,000. If your daily volume exceeds the cap, the calculator automatically splits your volume: the portion within the cap at 0% cost, the remainder at the post-cap rate (Duel: 0.1%, Gamdom: 1%). This blended calculation shows the true cost for high-volume players — not the simplified “100% RTP” headline.
For a full breakdown of how allowance systems work across operators, see Zero-Edge Allowance Explained. For the mathematical difference between native zero-edge and rakeback models, see Zero Edge vs. Rakeback.
The numbers in context
A casual player betting $10 per round, 120 rounds per hour, 2 hours per session generates $2,400 in daily volume — well within any platform’s zero-edge cap. The cost difference between 100% and 96% RTP on that volume: $0 vs. $96 per session, or roughly $2,880 per month.
A high-volume player at $500 per round exceeds Duel’s $50K cap in under an hour. For that player, the blended daily cost on Duel is not $0 but a small amount above cap — still dramatically cheaper than 96% slots, but no longer free. The calculator shows exactly where that crossover happens for your specific parameters.
