Roulette Calculator Online


  1. This is how the online roulette roulette calculators work. All players roulette text numbers to best is bet the exact amount of their bankroll in the respective field and click on the Calculate button. The calculator will compute three different betting units using best sum, namely a safe unit, bet recommended unit and roulette high-risk unit.
  2. Our online Predictor is the best helper for Roulette players in the casino. This program is not only a set of Random Number Generator (RNG) algorithms of various casinos but also a Roulette results analyzer, which is based on mathematical calculations and probability theory. How can I use it? All roulette field numbers are clickable.
  3. This was mostly due Roulette Calculator Online to the fact that the gambling sites back-offices weren’t that user-friendly, and it was hard to configure triggers for various types of bonuses. Today the technology has Roulette Calculator Online advanced a lot and casino bonus codes have almost become obsolete.

Roulette Calculator - Enter your bet amount and then press a button below where the ball lands Calculate the roulette probability of (13-24) along with the expected return on your $10.00 bet.


What does this calculator do?

I have created this roulette calculator to help you to determine the unit size that you should bet with depending on the size of your bankroll (the money you have to play with).

Why? Because when you pay a visit to the roulette table, you want to get the most from the game as possible with the money you have to play with.

  • Safe: An ideal unit if you want to maximize your time spent at the table. Average of 3,667 bets.
  • Recommended: A good unit size to start with. Average of 1,815 bets.
  • High Risk: An ideal unit if you want to go for bigger wins. Average of 889 bets.

Just enter your bankroll to the nearest whole number and click Calculate!

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Roulette probability calculator

American Roulette Odds Calculator

Tip: You could also enter your bankroll and bet size in to the simulator to see how your sessions could pan out.

Note: Your 'bankroll' is usually the amount you take to the casino for all gambling expenses. But when playing roulette online, this is just the balance you have to play with.

What is a unit?

A betting unit is a set amount that you bet with on each spin of the roulette wheel.

For example, if you have a bankroll of $100 to play with, you might choose to use $2 as your default betting unit.

In other words, a unit is a constant that you stick with throughout a session to ensure that you can spend an optimum amount of time at the wheel, whilst still giving yourself an opportunity to win a decent amount of money if you hit a lucky streak.

It's a way of giving yourself a solid base to play from so you'll know if you're getting carried away.

Why else do we use units?

Because some types of bets require multiple chips to make, and this allows us to compare their cost.

For example, the voisins du zero call bet covers a specific section of the wheel around the zero. To cover all 17 numbers you need to place a variety of straight and split bets on the table, and this particular bet requires 9 units in total.

In other words, a unit allows us to compare how much different types of bets cost relative to one another. So when you're playing you'll know that making a neighbours bet will cost you 5 units, whereas the snake will cost you 12 units. One bet is more expensive to make than the other.

Again, units just help you to manage your bankroll when placing different types of bets during your session.

Popular bets

  • Red/Black = 1 unit
  • Single Number = 1 unit
  • Voisins du Zero = 9 units
  • Jeu Zero = 4 units
  • Tiers du Cylindre = 6 units
  • Orphelins = 5 units
  • Neighbours = 5 units
  • Final = 3-4 units
  • Snake = 12 units

Finding your ideal betting unit

Roulette Calculator Online Calculator

The calculator should give you a rough idea of the ideal range of units that you should bet with at the roulette table. However, at the end of the day the amount that you decide to bet with on each spin is completely up to you.

Some people will want to be cautious with their money and will be content with betting a relatively small amount, whereas others will seek the thrill and excitement that a potential big win can bring.

If you are the type of player that likes to bet big and go for the big win, you have to be more vigilant with your betting to ensure that you do not lose more money than you are comfortable with.

If you feel yourself getting carried away, try and bring down your betting units as much as possible and keep them steady. Think of it as a form of strength training where you're building up your internal power of will. The last thing you want is to get frustrated and bet too much when you hit an unlucky streak.

Warning: If you become nervous when the ball is in motion and you feel your heart sink every time you lose on a spin, you are betting with too much money and need to walk away.

What is the perfect unit?

The perfect betting unit is one that maximizes the time you spend playing online roulette, whilst still giving you a rush of excitement on each spin.

Finding the balance isn't always going to be easy, so it's a good idea to experiment a little to find an amount that you are comfortable with. Just be sure to stick with it as you play, as it can be tempting to increase the size of your bets to try and recoup losses, so be careful.


Learn to enjoy the game whilst betting with smaller units and you will save yourself money in the long run.

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Small wins are better than big losses. Using a fixed betting unit just helps you to keep control.

Roulette Calculator online, free

Note: This betting calculator just gives you a suggestion for a practical bet size to play with. It will not have any effect on the amount of money that you expect to win or lose from each session you play.