Interactive Tool · House Edge Math

House Edge Calculator

Enter any bet's win probability and payout to calculate the exact house edge, RTP and expected loss.

Enter Bet Details

Enter as a percentage. Example: 47.37 for blackjack player.
to 1
Even money = 1. Blackjack = 1.5 (3:2). Straight-up roulette = 35.
Enter if some outcomes result in a push (bet returned). Leave 0 if no pushes.
Your bet in dollars. Used to calculate expected loss per hour.
Typical: Blackjack 60–80, Baccarat 70–80, Craps 50, Roulette 40–50.

Results

Enter a win probability and payout above to calculate the house edge on any casino bet.

Load a Known Bet

The Formula Behind Every Casino Bet

House edge is calculated from three inputs: the probability of winning, the payout for a win, and the probability of pushing (if applicable).

EV = P(win) × Payout − P(lose) × 1
House Edge = −EV × 100
P(lose) = 1 − P(win) − P(push)

A negative expected value means the player loses money on average. House edge is expressed as the absolute value — how many cents the casino keeps per dollar wagered. Read the full explanation →