Roulette odds calculator
Choose a wheel and enter the bet coverage and net payout. The model assumes each pocket is equally likely and rounds are independent.
How the calculation works
Let p = numbers covered ÷ wheel pockets and b = net payout to 1. Expected net per dollar is p × b − (1 − p). House edge is the negative of that value. A winning $10 bet at 35:1 earns $350 profit and returns $360 including stake.
On a 37-pocket wheel, a straight-up bet has p = 1/37. Expected net per dollar = (35 − 36)/37 = −1/37. On a 38-pocket wheel with the same payout, the result is −2/38. Do not apply these assumptions to side bets, multipliers, en prison or la partage.
The chance of at least one winning round is 1 − (1 − p)n. It is not the chance of ending the session ahead: multiple losing stakes can outweigh a win.
Download the calculated standard payout table (CSV). The file covers the seven preset bet groups on 37- and 38-pocket wheels, with no special zero rules or side bets. Parameters: Nevada Live Roulette paytable; Loto-Québec wheel rules. Checked 2026-10-02.