Roulette Odds Calculator
Pick a wheel and a bet, and see the true odds, the payout you are offered, and the gap between the two. That gap is the house edge, and on a single-zero wheel it is the same for every bet on the table.
Every bet on the selected wheel
| Bet | Covers | Pays | Chance | Odds | Returns per $100 | Edge |
|---|
How the numbers are derived
There is no estimation here. Payouts in roulette are set as though the wheel had 36 pockets: a bet covering k numbers pays 36 ÷ k − 1 to 1. A corner covers four numbers and pays 36 ÷ 4 − 1 = 8 to 1.
Expected return is then (payout + 1) × k ÷ N, where N is the real pocket count. On a European wheel that is always 36/37 = 97.30%, so the edge is 2.70%. On American, 36/38 = 94.74% and the edge is 5.26%. Mini Roulette scales the same formula to 12 and 13, giving 7.69%.
La partage adds one term: when zero lands, an even-money bet loses only half, so expected return gains 0.5 × zeros ÷ N. On a French wheel that is 0.5 ÷ 37 = 1.35%, exactly enough to halve the edge on those bets.
What "true odds" means
True odds are what a fair bet would pay. A straight-up bet on a European wheel wins once in 37, so fair odds are 36 to 1. You are offered 35 to 1. That one-unit shortfall, spread across 37 spins, is the 2.70%. Every roulette bet is the same story with different numbers.
How to use the Roulette Odds Calculator
- Choose the wheel you are playing: European, French, American or Mini.
- Choose a bet type. The list adapts to the wheel — the five-number bet only appears for American.
- Enter your stake per spin and how many spins you plan to play.
- Read the results: win chance, true odds against the payout offered, the house edge, and the expected cost of the session.
Worked example. A $10 straight-up on a European wheel: win chance 2.70% (1 in 37), payout 35:1 against true odds of 36:1, expected cost $0.27 a spin. Over 100 spins you stake $1,000 and expect to lose $27.03 — and the chance of hitting your number at least once is 93.54%. Switch the wheel to American and the cost becomes $52.63 for the same 100 spins.
GETRAKEBACK. 18+.
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18+. Roulette has a fixed house edge, so over enough spins the maths favours the operator — always. If you play for real, treat it as money spent on entertainment, set a limit before you start and stop when you reach it. Our responsible gambling page covers the warning signs and where to get free, confidential help.