With 100 stops on each of three reels, there are 1 million combinations. The change to virtual reels enabled programmers to make the reels to behave as if they had any number of stops. With bigger reels holding 20 symbols and 20 spaces, combinations increase to 40x40x40, or 64,000.If blank spaces between lines are used as stops, the number of combinations increases to 20x20x20, or 8,000.On early three-reel slots with 10 symbols per reel, there were 1,000 possible combinations (10 x 10 x 10).The sheer number of possibilities makes the math that goes into slot machine odds more complicated than on table games. The number of winning combinations and the payoffs per winner work together to determine a game’s odds. There also is an open field for game designers to assign how much each winning combination pays. There are thousands, and sometimes millions, of reel combinations. So, is there any way we can choose slots which offer better returns than others? And how can we know the house edge of a specific slot game? This is where RTP comes in, which we’ll talk about next.Slot machine odds work in a similar fashion to the roulette example, except there are many more possibilities on the slots. For example, a slot with 3 reels that holds 20 symbols per reel would give you a 7,999 to 1 chance of winning. You could have calculated your odds based on the number of reels and symbols per game. Therefore, it’s hard to quantify the odds of modern slot machines, whereas it was easier to figure out the true odds of an old-school mechanical game. The player also doesn’t know how the game was designed. But the vast number of possibilities makes the math of slots odds more complex than table games odds. The number of winning combinations and the payouts per combination work together to determine an online slot’s odds. It’s also up to individual game designers to determine how much each winning combination pays.

Because of the RNG software, there are thousands, and often millions, of reel combinations. Slots odds work in a similar way to our roulette example, except there are several more possibilities on slots.

How to win at slots at casino