How to Understand the Meaning of -105 in Sports Betting


You may be familiar with the term ‘over/under’ in sports betting, which indicates whether a team will score more or less than the number indicated by the line. If the total is 7.5, for example, then the over/under is +105. If you’re unfamiliar, see here for an example of an over/under line.

In many places sports betting is legal, but it’s not necessarily legal for U.S. citizens. If you’re outside the U.S., you may be in for a surprise when you place a bet and the lines don’t match up. Some places will have ‘no limits’ rules, which mean you can place as much or as little as you want, regardless of the amount you’re allowed to bet on a particular game. If you’re planning on traveling to a foreign country to gamble or vice versa, make sure to research the legalities and residency requirements first.

What does -105 mean in sports betting?

If you’re looking for an explanation of -105 in sports betting, keep reading. If you’d like to come back later and find out more, you can subscribe here to receive notifications when new content is available.

The mathematical symbol ‘-105′ commonly appears in casino gambling and in some forms of online betting to indicate an exact or close-to-exact split of probability in favor of the bettor. When using -105, you are essentially guessing which way the momentum will swing and taking the opposite side of the bet to achieve the desired effect.

For example, if you believe that Major League Baseball games will score approximately 6.5 runs per game on average then you can use -105 to make a wager that a team will score fewer than 6.5 runs per game. Because you’re taking the opposite side of the bet, you will win when the total run differential is in favor of the bettor. In this example, you are using -105 to create an advantage for yourself because you have a decent feeling that the average run total will be low and you want to make sure you profit from the low average when it comes up.

Another way to look at it is to consider a popular team to be a longshot in a particular game. If you’re considering laying money on a longshot, then using -105 can help you do so with confidence because you know the longshot has a decent chance of winning. You can also use this technique when you believe a short-priced team will cover the spread (spread bettors’ lingo for ‘win’). In general, when laying big money on a single play, you should use numbers ending in -105 to signify a longshot. Here, you are using a longshot to mean that you believe a particular team will lose by a lot or that the total will be way off the mark. When the total is close to ending in -105, you should take a peek and make sure you don’t have any other options before laying money on the longshot.


Let’s say you want to take a shot at making some money at the races. You look at the track and see that the betting odds are at +105 on a particular horse. If you want to place a wager on that horse, how would you do so?

You could try pairing the horse with another longshot in the hope of creating a killing combination. If your strategy works out and the two horses score, you could potentially win a huge amount of money. This is called a parlay, which is when you combine multiple bets into one wager to gain some benefit.

Another example would be if you feel that a coin toss will come up heads 15% of the time. You can use this information to place a wager that the toss will come up heads (HH) and get back (15% x HH) the amount you wagered. Similarly, if you believe the toss will come up tails (HT) 95% of the time, you can use the number 105 and get back (5% x HT) your original investment.

Hopefully, you’re now equipped with enough knowledge to understand what -105 means in sports betting. In the next section, we’ll discuss how you can use this information to place winning wagers.