House Edge Calculator
Expected-value & hourly-loss calculator for every casino game
Casinos and bookmakers profit from the house edge — the mathematically guaranteed gap between offered odds and true probabilities. This free house edge calculator shows, based on your stake, game speed and game type, how much you lose on average across 100, 500 or 1,000 rounds.
House Edge & Expected Value Calculator
Play with the numbers instead of believing them. Pick a game, enter your stake and number of rounds — the calculator shows the mathematically expected loss and how the house edge eats into your bankroll.
Note: Expected value is a long-run average. In the short run you may win or lose much more — that is variance.
How to use this house edge calculator — step by step
Get your real expected loss in under a minute:
- 1Pick the game
Select the game (roulette, blackjack, slots, sports betting) or enter a custom house edge percentage.
- 2Stake per round
Enter your typical stake per spin / hand / bet (e.g. €2).
- 3Rounds or playtime
Enter the number of rounds or your playtime in hours. The tool ships with typical rounds-per-hour values.
- 4Read the results
You see total wagered, expected loss in euros and percent — plus the hourly rate the casino earns from you.
What is the house edge?
The house edge is the percentage of your stake the casino keeps long-term. European roulette: 2.7 %. American roulette: 5.26 %. Blackjack with basic strategy: about 0.5 %. Sounds small — multiplied across hundreds of rounds per hour it adds up fast.
What is expected value (EV)?
Expected value is the average profit or loss per round if you played infinitely often. Formula: EV = stake × (− house edge). With negative EV (every casino game) you are guaranteed to lose in the long run — variance only shifts that short-term.
How does the calculator estimate hourly loss?
Hourly loss = stake per round × rounds per hour × house edge. Example: €2 on red at European roulette × 60 spins/h × 2.7 % = €3.24/h. On a fast slot at 600 spins/h with 5 % edge the same stake costs €60/h.
Which games have the lowest house edge?
Blackjack with basic strategy (~0.5 %), baccarat banker (~1.06 %), French roulette with La Partage (~1.35 %). The worst edges are keno (25 %+), American roulette (5.26 %) and many slots (3–10 %).
Is the house edge calculator also an RTP calculator?
Yes — RTP = 100 % − house edge. A slot with 96 % RTP has a 4 % edge. The calculator accepts both inputs and converts automatically — ideal for comparing slots, table games and bets on the same scale.
Why play at all?
Gambling is entertainment. If you treat the expected loss as the price of admission — like a cinema ticket — that's fine. It becomes a problem when you reinterpret the loss as an opportunity to win or chase losses.