Free Roulette Calculators

Which one to open first

1. Roulette odds calculator — pick any bet on any wheel and see the true odds, the payout you are offered, and the gap between them. Start here; everything else is downstream of this number.
2. Session cost calculator — turns bet size and spins per hour into a cost per hour. This is the figure that matters for budgeting, and it is almost never the figure people have in mind.
3. Bankroll survival calculator — how long a bankroll lasts, and the chance of reaching a win target before running out. Uses the gambler's-ruin formula rather than a guess.
4. Strategy simulator — run Martingale and its relatives thousands of times and watch the ruin rate rather than the anecdote.
5. Bonus wager calculator — before any deposit, put the offer through this. If clearing the bonus costs more than the bonus is worth, it says so.
6. Rakeback calculator — what a rebate on turnover is actually worth against the edge you pay, and why the definition of "rakeback" matters more than the percentage.
7. Payout calculator — build a whole board of bets and see what it risks, covers and returns. The proof that coverage never lowers the edge.
8. Wheel simulator — not a calculator, but the fastest way to see what genuine randomness looks like over fifty spins.

A note on precision

Roulette maths is exact. There is no estimation, no simulation error and no house-specific fudge factor in the odds, payout and house-edge figures — they fall out of the pocket count and the paytable. The only tools here that involve sampling are the strategy simulator and, optionally, the bankroll calculator; both report how many runs they used so you can judge the noise.