Roulette calculators and simulators
Seven tools that answer the questions actually worth asking before a session: what this bet really pays, what an hour at the table costs, whether a bonus can be cleared on roulette, and what happens to a betting system over ten thousand spins. All free, all running locally in your browser.
Roulette Odds Calculator
True odds, payout odds and house edge for every bet on the layout.
Free toolRoulette Payout Calculator
Work out exactly what a winning bet returns before you place it.
Free toolBankroll Calculator
How long a bankroll survives at a given stake, spin rate and house edge.
Free toolBetting Strategy Simulator
Run Martingale, D'Alembert, Fibonacci and flat betting over thousands of spins.
Free toolRakeback Calculator
Turn a rakeback percentage into a real figure for your own volume.
Free toolWagering Requirement Calculator
See the real turnover a bonus demands once roulette weighting is applied.
Free toolRoulette Wheel Simulator
Spin a full-speed wheel and record results — no bets, no balance, just data.
What these tools are for
Every calculator here answers a question that has an exact numerical answer, and none of them requires an account, sends anything to a server or stores what you type. They run entirely in your browser, which is also why they work offline once the page has loaded.
They exist because roulette is one of the few casino games where the important numbers are knowable in advance. Unlike slots, where the RTP is a published claim you cannot verify, roulette's cost follows directly from the pocket count and the paytable — both of which are printed on the table. Once you can compute it, the whole game becomes a budgeting exercise rather than a mystery.
Where to start
If you are new to roulette, open the odds calculator and change the bet type while watching the house edge field. It does not move. That single observation is worth more than most strategy articles.
If you are planning a session, use the bankroll calculator to convert your budget into hours. If you are comparing casino bonuses, the wagering calculator is the one that will save you money.
And if you believe you have found a system, run it through the strategy simulator over a few thousand sessions before you fund it. We built that tool specifically so people could disprove their own ideas cheaply.
The four numbers that describe any roulette session
- Average bet. Not your biggest bet and not your buy-in — the typical amount riding on a single spin.
- Spins per hour. 30–45 at a dealt table, 60–80 on auto roulette, 110+ on fast RNG tables.
- House edge. 1.35% French with La Partage, 2.70% European, 5.26% American, 7.69% mini.
- Session length. The one people never decide in advance, and the one that turns an hourly cost into a total.
Multiply the first three and you have your cost per hour. Multiply by the fourth and you have the price of the evening. Every tool on this page is a variation on that arithmetic, applied to a specific decision.
A note on accuracy
All figures use standard published paytables. Where an operator runs a non-standard variant — mini roulette with half-back on zero, or a game-show wheel with an unusual multiplier ladder — the numbers shift, and the tools let you enter the relevant values rather than assuming. If you spot a figure you believe is wrong, tell us and we will correct it in place with the date changed.