Slots odds are the probabilities of getting a winning combination on the reels. They depend on the type of slot machine you play. Originally the odds were very easy to calculate as the only thing the players had to consider were the number of reels and the symbols used on each of the reels. As a result, the 3-reel slot machines are traditionally believed to be better for player's winning chances, and thus the more reels and symbols on them, the lower a player's advantage.

Each reel of the slot machine has a set of symbols imprinted on it. The chances of hitting a particular symbol are calculated through dividing it by the total number of symbols on each reel. For example: slot machine odds for hitting one symbol on a standard three-reel machine with ten symbols on each reel are 1 divided by 10, which is actually 9 to 1. The odds of hitting two identical symbols on two reels are 1/10 multiplied by 1/10, which is 1/100, or 99 to 1. The jackpot never gets more likely to hit. If the odds of hitting a jackpot on one spin are 1 in 250,000, then they're always 1 in 250,000, whether the last jackpot hit last year or five minutes ago. No slot machine is ever 'due' to hit. That's the way randomness works. Over the several million times your carrot, machine is played, once in every 8,000 plays it will produce three carrots, one on each reel, perfectly aligned across the center of the viewing screen. If a machine had four reels, the odds of hitting the jackpot would be 20.20.20=160,000:1. For five reels the odds would be 3,200,000:1. The thing is that the slot machines tell you the payouts but none of them indicate the ODDS of hitting a payout. Not a single one says the likelihood of getting five little pictures of Zeus in a row is 8000 to 1 or whatever.

How to Calculate Odds

The odds of getting any combination on the slot reels are easy to calculate if you know the number of symbols used on each reel. Let's take a closer look at the odds and consider an example:

If you have to make a line of 3 diamonds on one payline to win the jackpot, it is most likely that each reel has only one diamond symbol on it. If the machine is a 3-reel one and there are 20 symbols on the reels, the chances of hitting this combination are:

Possible combinations on the reels: 20 x 20 x 20 = 8000. The odds of getting this combination are 1 in 8000. For a 5-reel slot machine the chances are even less: 20 x 20 x 20 x 20 x 20 = 1/ 3,200,000 (1 in 3,200,000). The slots probabilities are usually shown as a percentage, so for 3-reel and 5-reel slot machine with 20 symbols on each reel we have these probabilities:

However, the number of symbols on the reels can differ from machine to machine, and that is why the slots odds are different. Here we look at some more examples of slot machines containing 3 and 5 reels each with different number of symbols on them - for these examples: 20, 22 and 25.

Slot Machine Type	Number of Symbols	Number of Combinations	Odds	Probabilities
3-reel	20	8,000	1 in 8,000	0.0125%
	22	10,648	1 in 10,648	0.0093%
	25	15,625	1 in 15,625	0.0064%
5-reel	20	3,200,000	1 in 3,200,000	0.0003125%
	22	5,153,632	1 in 5,153,632	0.0000194%
	25	9,765,625	1 in 9,765,625	0.00001025%

Slots Payback Percentages

The slots payback or return is the amount of money the slot machine pays out as winnings, against the total number of credits wagered by players. The payback is always shown in percentage.

The main idea behind counting the odds in slot machines lies in understanding how the machine pays out money. Unlike what many people believe, not everything is random in a slot machine. Slots are programmed to pay out a certain percent of the money put in with each play.

For example, one machine may pay back 80% of bets while another one may pay back 91% and even 100%. This means that for every dollar put in the machine the casino takes 9 cents and pays out 91 cents. But it does not do it for every dollar put in, it just pays out explosively and this is what makes the game so great.

You must remember that there are two basic types of slot machines. These are:

Loose slots are slot machines that are programmed to return 82-98% of the wagered money, or even more if you play slots online. As a rule, high-denomination slots pay out more than those offering, for example, $0.05 or $0.25 bets. For more about typical paybacks on different slot machines please read the strategies page.
Tight slots are machines that pay out less than 80% and sometimes down to 50% of the wagered money. To avoid playing at these slot machines try not to gamble in motels, airports, bars, gas stations, etc. The payback percentages vary from casino to casino and that is why it may be difficult to find the best machine in the gambling hall.

As you understand, one of the best slots tips on how to win at slots is always to look for the loose machines. It can be easy if the gambling hall shares this information with the visitors. In any case you can gamble on the Internet as most online casinos provide the statistic data about their slots games. So, when choosing one of the casinos recommended by SlotsDoc.com you can expect such paybacks:

Introduction to Controls Slot Machine Odds

Who controls slot machine odds is a popular question from slots enthusiasts. It’s quite an interesting question, which I thought my audience would appreciate an answer to.

My most recent encounter with this general question was during the Q&A segment of another gambling podcast, episode #634 from Five Hundy By Midnight. They had a question from David which was, “When a new themed penny slot debuts, what is the typical hold percentage? Does it vary by machine, casino, or both?”

Tim and Michelle, co-hosts of the long-lasting Five Hundy By Midnight, a gambling podcast that’s all about Las Vegas, answered the question well, if somewhat briefly.

I’m sure my own audience would like the answer too, so I’m providing a few more details as well as a more general answer with a bit of the why of it all.

This segment has the following sections:

Introduction
A Bit of Background on Legal Requirements
A Bit of History on Physically Setting Odds
Slot Machine Types Based on How Odds are Set
Identifying Who Controls Slot Machine Odds
Does It Really Matter Who Controls Slot Machine Odds? Yes!!
Summary

Keep Reading … or Watch Instead!

Or … Listen Instead!

A Bit of Background on Legal Requirements

To answer this question, I’ll need to delve into a bit of recent history to explain how odds are set in older-style standalone slot machines using a random number generator (RNG). This way is how many people incorrectly believe the odds are currently set on ALL slot machines.

However, starting around 2008, a lot changed with setting slot machine odds. These changes are due to the emergence of new gaming technologies, not only in slot machines but also with the development of casino operating software. Both provide casinos with an increased operating efficiency and therefore low operating costs.

With so many more people visiting casinos in the last decade, and with their profit margins getting smaller every year, casino operators find they cannot afford to ignore the savings opportunities of new technologies.

The second driver for this change to how slot machines are controlled is due to ongoing developments in statutory regulations for gaming jurisdictions. In the U.S., these gaming jurisdictions are the states, territories, or federal district that legally allow gaming.

In essence, casino operators have to follow the gaming regulations for the jurisdiction wherein they

Odds Of Hitting Slot Machine