Roulette Odds Calculator UK: Payouts, Probability & Returns
Enter your stake, choose the bet and the calculator gives you the profit, total money returned, exact chance of winning, house edge and expected loss. The other tabs work out repeated-spin probability and the cost of covering several numbers at once.
Calculate Payouts, Probability and Number Coverage
Choose the mode that matches your question. Every result updates instantly in your browser; no download or sign-up is needed.
Use this mode for standard roulette bets such as straight up, split, corner, dozen, column or red/black.
A 35:1 payout means £350 profit on a £10 winning straight-up bet. Your £10 stake is returned as well, so the total paid back is £360.
Calculate the chance of at least one win, no wins, or exactly a chosen number of wins across repeated independent spins.
Repeated spins increase the cumulative chance of seeing a hit, but they do not change the probability of the next individual spin.
Select individual pockets to model equal straight-up chips across several numbers. This mode shows total stake, net profit if one selected number lands, and cumulative hit probability.
No pockets selected.
Each selected pocket is treated as a separate straight-up bet at 35:1. The total returned after a hit is 36 times one chip; all other selected chips lose on that spin.
Read the Calculator Result Correctly
Most mistakes come from mixing up four different figures. The calculator keeps them separate so you can see what a bet pays and what it costs over time.
The winnings after the successful stake has been removed. A £10 straight-up winner pays £350 profit.
Profit plus the winning stake returned. The same £10 straight-up winner returns £360 in total.
The number of covered pockets divided by the number of pockets on the wheel. It is not the same as the payout.
The casino’s long-run mathematical advantage. It is not the percentage chance that you lose one particular spin.
Profit = stake × payout ratio | Total return = profit + winning stake
Popular Roulette Payout Checks
These are the questions players ask most often. The examples use a single-zero European wheel and standard casino payouts.
| Bet | Stake | Chance | Profit if it wins | Total returned | Plain answer |
|---|---|---|---|---|---|
| Red or black | £10 | 18/37 = 48.65% | £10 | £20 | You double the winning stake. |
| Red or black | £100 | 18/37 = 48.65% | £100 | £200 | £100 profit, not £200 profit. |
| Zero or one number | £10 | 1/37 = 2.70% | £350 | £360 | Zero pays the same 35:1 as any number. |
| Zero or one number | £100 | 1/37 = 2.70% | £3,500 | £3,600 | The £100 stake is included in the return. |
| Dozen or column | £10 | 12/37 = 32.43% | £20 | £30 | A 2:1 win returns three times the stake. |
| Split bet | £10 | 2/37 = 5.41% | £170 | £180 | Two numbers are covered at 17:1. |
Complete Roulette Payout and Probability Chart
European and American roulette use the same standard payout ratios. The American probabilities are lower because the double-zero wheel has 38 pockets rather than 37.
| Bet | Payout | Pockets covered | European / French | American | £10 profit | £10 total return |
|---|---|---|---|---|---|---|
| Straight up | 35:1 | 1 | 2.70% | 2.63% | £350 | £360 |
| Split | 17:1 | 2 | 5.41% | 5.26% | £170 | £180 |
| Street / trio | 11:1 | 3 | 8.11% | 7.89% | £110 | £120 |
| Corner | 8:1 | 4 | 10.81% | 10.53% | £80 | £90 |
| Six line | 5:1 | 6 | 16.22% | 15.79% | £50 | £60 |
| Dozen / column | 2:1 | 12 | 32.43% | 31.58% | £20 | £30 |
| Red, black, odd, even, low or high | 1:1 | 18 | 48.65% | 47.37% | £10 | £20 |
On a European wheel there are 36 losing pockets for one winning pocket, so the fair odds against are 36:1. The casino pays 35:1. That one-unit gap creates the 2.70% house edge.
European, French and American Roulette Odds
The extra green pocket is the main reason American roulette costs more to play. French roulette uses the same single-zero wheel as European roulette, but La Partage can return half of an even-money stake when zero lands.
Odds and Payouts for Green, Zero and Double Zero
Zero is not a special high-paying bet. A straight-up bet on 0 pays the same 35:1 as a bet on 17, 26 or any other single pocket. On an American wheel, 00 also pays 35:1.
Roulette Probability Over Several Spins
The Multi-Spin tab answers cumulative questions such as “What is the chance my number appears at least once in 20 spins?” It does not predict when a hit will occur.
One number in 10 spins
The chance of at least one hit on a European wheel is 23.97%. The chance on each individual spin remains 1/37.
One number in 20 spins
The chance of at least one hit rises to 42.19%. A miss on the first 19 spins still does not make the 20th spin more likely.
Five straight losses on red
A specified five-loss run has a probability of about 3.57%, roughly 1 in 28 from the chosen starting spin.
At least one win in n spins = 1 − (1 − p)n
Ten blacks in a row do not make red “due”. On the next European spin, red is still 18/37, black is still 18/37 and zero is still 1/37.
Number Coverage: More Hits, Smaller Net Wins
The Number Coverage tab places the same straight-up chip on every selected pocket. Covering more numbers raises the chance that one chip wins, but every extra chip also increases the total stake.
Those net figures assume £1 on each selected number. One winning straight-up chip returns £36 in total, then the losing chips are deducted. The standard house edge remains 2.70% however many numbers you cover.
Net profit after one selected number hits = 36 × chip value − total stake
Which Roulette Bet Has the Best Odds?
“Best odds” can mean the highest chance of winning one spin or the lowest house edge. Those are different questions.
| Option | Chance of a full win | House edge | What it is best for |
|---|---|---|---|
| French even money with La Partage | 18/37 = 48.65% | 1.35% | Lowest common edge when the rule applies. |
| European even money | 18/37 = 48.65% | 2.70% | Highest standard hit rate on a single-zero table. |
| European dozen or column | 12/37 = 32.43% | 2.70% | A 2:1 payout without changing the standard edge. |
| European straight up | 1/37 = 2.70% | 2.70% | Largest standard payout at 35:1, but the lowest hit rate. |
| American even money | 18/38 = 47.37% | 5.26% | Only for players who specifically want the double-zero layout. |
A larger payout does not mean a better return percentage. On one standard wheel, the usual straight-up, split, corner, dozen and even-money bets all carry the same house edge.