Open-Source Tool

House Edge Calculator

Calculate the true house edge, RTP, and expected loss for popular crypto casino games

⚙ Parameters
Classic dice: you pick a target number and bet over/under. The payout depends on your win probability.
50.0%
📊 Results
House Edge
1.00%
Per bet placed
Return to Player (RTP)
99.00%
Expected Loss per 100 Bets
1.00
Based on your bet size
Win Probability
50.00%
Excellent Average Poor
Low edge — fair game
📉 Expected Loss Over Time
After 100 Bets
—
After 500 Bets
—
After 1,000 Bets
—
After 10,000 Bets
—
⚖ Typical House Edges by Game
Game Typical Edge RTP Rating
🎲 Dice (1% edge) 1.00% 99.00% Excellent
🚀 Crash (1% fee) 1.00% 99.00% Excellent
🃏 Blackjack (8D S17) 0.46% 99.54% Excellent
🎡 European Roulette 2.70% 97.30% Average
🎡 American Roulette 5.26% 94.74% Poor
📍 Plinko (typical) 1.00% 99.00% Excellent
🎰 Slots (typical) 4.00% 96.00% Average

📐 How House Edge Is Calculated

The house edge represents the mathematical advantage the casino has on every bet you place. It's expressed as a percentage of each wager that the casino expects to keep over time.

For dice games:

// Fair payout = 1 / (win chance / 100)
// House edge = (1 - (actual payout / fair payout)) × 100

Win chance: 50% → Fair payout: 2.00×
Casino offers: 1.98× → House edge: 1.00%

For crash / limbo:

// The commission is taken from the prize pool each round
// House edge ≈ commission percentage

Commission: 1% → House edge: 1.00%

For roulette:

// House edge = number of zeros / total slots × 100

European: 1/37 = 2.70%
American: 2/38 = 5.26%

Return to Player (RTP) is simply 100% - house edge. An RTP of 99% means that for every $100 wagered, you can expect to get $99 back on average over a large number of bets.

Keep in mind that house edge describes the long-term mathematical expectation. Short-term results can vary wildly due to variance, which is why gambling should always be approached responsibly.