What is house edge in gambling?
House edge is the average share of each wager the casino keeps, built into payouts that are slightly smaller than true odds justify. A 1% edge means every 1 BTC wagered costs 0.01 BTC in expectation over time.
Every casino game pays winners a little less than the true odds of the event. That gap, expressed as a percentage of the wager, is the house edge. It is not a fee you see deducted; it is baked into the payout multiplier.
The key detail players miss: the edge applies to turnover, not deposits. If you deposit 0.1 BTC but recycle it through 10 BTC of total bets, your expected loss at a 1% edge is 0.1 BTC, your entire deposit. Slow, small bets keep expected cost low; high volume grinds it up regardless of any staking pattern.
How do you calculate house edge from chance and payout?
Multiply win chance by the payout multiplier to get the return per unit, then subtract from 100%. Dice at 49.5% chance paying 2x returns 0.495 x 2 = 0.99, so the edge is 100% - 99% = 1%.
The formula is edge % = 100 - (chance % x multiplier). Check any dice setting with it:
- 49.5% chance x 2.00x payout = 99.0 returned per 100 wagered. Edge = 1%.
- 10% chance x 9.90x payout = 99.0 per 100. Edge = 1%.
- 0.1% chance x 990x payout = 99.0 per 100. Edge = 1%.
Notice the product is 99 at every slider position: crypto dice charges the same 1% whether you grind safe bets or chase 990x longshots. If a site's numbers multiply to less than 99, its edge is higher than advertised. Run your own settings through our dice house edge calculator to see the exact edge, payout, and expected loss for any chance value before you bet.
How does house edge compare to RTP?
They are the same fact stated from opposite sides: RTP is the share returned to players, edge is the share kept. Dice with a 1% edge has 99% RTP. Slots advertising 96% RTP carry a 4% edge.
RTP (return to player) and house edge always sum to 100%. Casinos market slots by RTP because 96% sounds generous, while dice players talk edge because 1% sounds cheap. Same arithmetic, different framing.
Comparing across games shows why dice attracts math-minded players:
| Game | House edge | RTP |
|---|---|---|
| Crypto dice | 1% | 99% |
| Blackjack (basic strategy) | ~0.5% | ~99.5% |
| European roulette | 2.7% | 97.3% |
| Slots (typical online) | 4-8% | 92-96% |
Only blackjack played with perfect basic strategy beats dice, and it demands per-hand decisions. Dice delivers a near-blackjack edge with zero skill requirement, which is why the 1% standard became the benchmark across the best bitcoin dice sites.
Can a betting system overcome the house edge?
No. Every bet has negative expected value, and no sequence of negative-EV bets sums to a positive one. Progressions like martingale reshape when you lose, trading many small wins for rare large busts, while expected loss stays 1% of turnover.
The edge is per-bet and independent of history. A martingale doubling ladder, a Fibonacci sequence, or streak chasing all change the distribution of outcomes, never the expectation. Simulate a million rolls of any progression at a 1% edge and the aggregate loss converges to 1% of everything wagered.
What players can control: total turnover (fewer, smaller bets cost less in expectation), variance (chance settings), and rebates like rakeback that refund part of the edge. Those are real levers. Beating the edge itself is not one of them, and any site or seller claiming otherwise is misleading you.
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