What the Roulette Payout Calculator Shows
The roulette payout calculator above turns a bet idea into a complete numerical breakdown. You choose a bet type from the standard inside and outside bets, enter a stake amount in dollars, and pick European, French or American roulette. The tool then reports five numbers: the payout ratio fixed by the rules of the game, the total return if your bet wins, the profit portion of that return, the probability of winning at all, and the long-run house edge that the chosen wheel applies to your wagered money. Together they describe both the upside and the cost of every bet on a roulette layout.
How Roulette Payout Ratios Work
Payout ratios in roulette are fixed by the rules of the game and do not change between casinos. A straight up bet on a single number pays 35 to 1. A split between two adjacent numbers pays 17 to 1. A three number street pays 11 to 1, a four number corner pays 8 to 1, a six line covering two adjacent streets pays 5 to 1, a column or dozen pays 2 to 1, and every even-money bet such as red, black, odd, even, 1-18 and 19-36 pays 1 to 1. The ratio is always written as profit to stake, so a 35 to 1 winning bet of $10 pays $350 in profit plus the original $10 stake back.
Total Return vs Profit in Roulette
Beginners sometimes confuse total return with profit. Total return is the full amount the dealer pushes back to you after a win, including your original stake. Profit is the part of that return that you did not bring to the table. On a $10 straight up bet, total return is $360 and profit is $350. On a $10 red bet, total return is $20 and profit is $10. The calculator separates these two numbers so it is clear how much new money the bet actually generates and how much is just the return of capital.
How Roulette Win Probability Is Calculated
Win probability for any roulette bet is the count of covered numbers divided by the total number of pockets, expressed as a percentage. A straight up bet covers one number out of 37 on a European wheel, which gives 2.70%. The same bet on an American wheel covers one number out of 38, which gives 2.63%. A red bet covers 18 numbers, so the probability becomes 48.65% on European and 47.37% on American. The calculator applies this formula directly so the probability always matches the wheel selected.
European Roulette Odds
European roulette uses a single zero wheel with 37 pockets. The house edge is 2.70% across every bet type, because the single green pocket is the only structural advantage the casino has. Even-money bets win 18 of 37 spins on average, dozens and columns win 12 of 37, six lines win 6 of 37, corners 4 of 37, streets 3 of 37, splits 2 of 37 and straight ups 1 of 37. The payout ratios listed earlier are calibrated so that every bet shares the same 2.70% disadvantage in the long run.
American Roulette Odds
American roulette adds a double zero pocket, so the wheel has 38 pockets instead of 37. Payout ratios remain the same, but the probability of every bet drops slightly. The total house edge rises to 5.26%, which is the most important number on the American layout. Over the same amount of wagered volume, an American wheel takes nearly double the expected amount compared with European or French wheels. That is why this calculator and the simulator consistently flag American roulette as the worst choice for any system, including Martingale.
French Roulette and Special Rule Variations
French roulette shares the European wheel of 37 pockets. By default this calculator treats French and European as identical and uses a 2.70% house edge for both. The French game can offer La Partage, which returns half of an even-money bet when the ball lands in zero, or En Prison, which holds the bet for one more spin. Either rule lowers the even-money house edge to 1.35% when it is actively applied. The calculator does not assume those rules unless a specific casino confirms them.
Inside Bets and Their Payouts
Inside bets are placed on individual numbers or small groups inside the number grid. They have low win probability and high payout ratios. Straight up pays 35 to 1, split pays 17 to 1, street pays 11 to 1, corner pays 8 to 1 and six line pays 5 to 1. Inside bets are popular because the upside per spin is large, but they are also where bankrolls disappear fastest. The probability of any specific straight up number on a European wheel is only 2.70%, so most spins lose by design.
Outside Bets and Their Payouts
Outside bets cover broad sections of the layout. Columns and dozens each cover twelve numbers and pay 2 to 1. Red, black, odd, even, 1-18 and 19-36 each cover eighteen numbers and pay 1 to 1. Outside bets are the typical home of betting systems like Martingale because the near 50% win probability looks like a coin flip. The probability is not exactly 50% because the green zero pockets break the symmetry of the wheel, which is the whole reason the house edge exists in roulette.
Why Payouts Do Not Remove the House Edge
Roulette payouts are set so that every bet type returns the same house edge over time. A 35 to 1 straight up bet on a European wheel would pay 36 to 1 in a fair game where there were 36 pockets and the casino had no edge. The actual 35 to 1 payout combined with 37 pockets generates the 2.70% edge that funds the casino. Switching between bet types only changes the variance of outcomes, not the long-run cost. That is why no combination of bet types can structurally beat roulette.
How to Use This Calculator Before Testing Martingale
Before running the strategy simulator or planning a Martingale calculator session, use this payout tool to make sure you understand the cost of the bet you intend to use. Most Martingale users place even-money bets where the payout is 1 to 1. Confirm the win probability for your chosen wheel here, then use that number in the Martingale calculator so the success probability and risk of ruin reflect the real odds rather than the cleaner 50% approximation that beginners often assume.
Responsible Use of Roulette Payout Information
Payout numbers are descriptive, not prescriptive. Knowing that a straight up bet pays 35 to 1 does not make that bet a good idea, and knowing that even-money bets win nearly half the time does not turn Martingale into a winning system. Use this calculator to understand the mechanics of roulette and to compare bet types honestly. Read the responsible gambling page before using any of this information for real money play, and never bet money you cannot afford to lose.
To choose the right wager, compare even-money bets with the wider group of outside bets, review the best bets for Martingale, and see why using Martingale on inside bets is rarely practical.