Use this calculator to skip the manual math on roulette. Enter the numbers, check the output, and treat it as a decision tool, not a guarantee.
What the Calculator Does
Roulette bets pay by how many numbers they cover. A single number pays 35:1, a split 17:1, a street 11:1, a corner 8:1, and a six-line 5:1. Red/black, odd/even, and high/low pay even money, while columns and dozens pay 2:1.
How to Use It
- Use the payout calculator to see the return for any stake size.
- European wheels have 37 pockets and a 2.70% house edge; American wheels add 00 and jump to 5.26%.
- Outside bets win more often but pay less; inside bets lose more often but pay more.
Example
A $10 straight-up win returns $350 profit plus the original $10 stake. A $10 dozen bet at 2:1 returns $20 profit plus the $10 stake.
Math Note
Divide 36 by the number of winning pockets and subtract 1 to get the true-odds payout. The difference between true odds and the actual payout is the house edge.
How to Start
Pick one real bet from your records and run it through the calculator by hand. Once the manual and automated answers match, use the tool for new bets.
What to Avoid
- Chasing hot numbers because recent results do not affect the next spin.
- Using the American wheel when a European wheel is available.
- Betting too many numbers and eroding wins with overlapping coverage.
Bankroll Note
Roulette is a negative-expectation game. Set a loss limit and stop when you hit it. Do not increase bets after losses to recover.
What to Do Next
Review one bet or one session each week. Write down what worked, what did not, and one change to make next week. Small, consistent reviews close leaks faster than binge reading. Use a simple spreadsheet or a notes app so the review takes less than five minutes.
When to Stop
Stop when you hit your loss limit, your time limit, or your tilt threshold. Chasing never improves the math. A break is part of a winning process. Walking away at the right time protects your bankroll and keeps your decisions sharp for the next session.