Roulette Payout Calculator — Odds, Payouts & House Edge
Enter your bet type, wheel variant and bet amount to see the exact payout on a win, the probability of winning, the house edge, and the long-run expected value of each spin — whether you're betting on a single number or an even-money chance.
Roulette wheel
Bet type
$
Net profit returned to you on a winning spin (your stake is also returned)
- 1
Win probability
1 ÷ 38 = 0.0263Number of pockets covered by this bet divided by total pockets on the wheel. - 2
Payout (net profit)
10 × 35 = 350
How does this calculator work?
Roulette payout = bet × payout-ratio (e.g. 35:1 for straight up). Win probability = coverage ÷ total pockets. House edge is fixed at 2.70% (European) or 5.26% (American) for all standard bets — no strategy changes this. Expected value per spin = P(win) × profit − P(lose) × stake.
Formula
How this is calculated
A roulette wheel is divided into numbered pockets. A European wheel has 37 pockets (0 through 36); an American wheel adds a 00 pocket for 38 total. All pockets are equally likely. The casino pays out according to fixed payout ratios — a straight-up single number pays 35:1, meaning a $10 bet returns $350 profit if that number hits — but the true odds are 36:1 (European) or 37:1 (American), so the house keeps the difference.
Win probability = (numbers covered by the bet) ÷ (total pockets). For any bet the expected value per spin is P(win) × profit − P(lose) × stake. Because every standard payout on a European wheel yields an expected value of −1/37 ≈ −2.70% of the stake, and on an American wheel −2/38 ≈ −5.26%, the house edge is fixed regardless of which bet you choose. The only exception is the American five-number bet (0, 00, 1, 2, 3), which has a 7.89% house edge and should generally be avoided.
No betting strategy — martingale, Fibonacci, or otherwise — can overcome the negative expected value; over many spins the results converge to the expected loss. This calculator is purely educational and assumes fair, unbiased play.
Frequently asked questions
On a European single-zero wheel the house edge is 1/37 ≈ 2.70% on all standard bets. On an American double-zero wheel it rises to 2/38 ≈ 5.26%. These percentages represent the average share of each bet the casino keeps in the long run. Prefer European roulette whenever possible.
A straight-up bet on a single number pays 35:1 — if you bet $10 you win $350 profit plus get your $10 stake back ($360 total return). The probability of winning is 1/37 (European) or 1/38 (American), making it the highest-payout but lowest-probability bet on the table.
No. Each spin is independent, and the negative expected value is constant regardless of bet sizing or sequencing. Strategies like the martingale (doubling after a loss) can produce short-run wins but increase variance and the risk of catastrophic loss without changing the long-run edge in favour of the player.
Also known as
TG we-Calculate Editorial Team. (2026). Roulette Payout Calculator — Odds, Payouts & House Edge [Online calculator]. TG we-Calculate. https://we-calculate.com/calculator/roulette-payout-calculator
TG we-Calculate Editorial Team. "Roulette Payout Calculator — Odds, Payouts & House Edge." TG we-Calculate. 2026. https://we-calculate.com/calculator/roulette-payout-calculator.
TG we-Calculate Editorial Team, "Roulette Payout Calculator — Odds, Payouts & House Edge," TG we-Calculate, 2026. [Online]. Available: https://we-calculate.com/calculator/roulette-payout-calculator
@misc{wecalculate_roulette_payout_calculator, title = {Roulette Payout Calculator — Odds, Payouts & House Edge}, author = {{TG we-Calculate Editorial Team}}, howpublished = {\url{https://we-calculate.com/calculator/roulette-payout-calculator}}, year = {2026}, note = {TG we-Calculate} }
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