JILI GAMES Sports Betting Basics: Odds, Markets, Settlement
Odds come in three formats: decimal (2.50), fractional (3/2) and American (+150).
- JILI GAMES PK Betting
- PK is short for pick'em: a spread of zero, with no favourite and no underdog.
- JILI GAMES MPBL Betting
- MPBL odds come as three prices per game: a moneyline on the winner, a spread on the margin and a total on the combined score.
- JILI GAMES UFC Odds
- UFC odds start with a two-way price on the winner, with a favourite shown as a minus number and an underdog as a plus number.
Sports betting basics start with one fact: every price on a betting screen is a statement of probability, written in a format that depends on the sportsbook’s home market. Learn to read the three common formats, the three main markets and the settlement rules, and any sports page on the web becomes readable. This pillar covers those pieces and points to three detail pages for specific lines.
This site is a JILI slots guide. The sports pages sit here because readers who play slots meet sports prices on the same casino screens, and the arithmetic behind a price is the same arithmetic that sits behind a slot’s return. The pages give no tips and no predictions, only how the numbers work.
Sports betting basics: the three odds formats
Odds say how much a winning bet returns. The same price can be written three ways, and Wikipedia’s entry on fixed-odds betting names where each is common: fractional odds in the United Kingdom and Ireland, decimal odds in Continental Europe, Australia, New Zealand and Canada, and moneyline (American) odds in the United States.
| Format | How it reads | What the number tells you | Example price |
|---|---|---|---|
| Decimal | One number, above 1.00 | Total return per 1 staked, stake included | 2.50 |
| Fractional | Two numbers with a slash | Profit relative to the stake | 3/2 |
| American | Plus or minus, then a number | Plus: profit on 100. Minus: stake needed to profit 100 | +150 |
The three examples in the last column are one price. A ₱100 stake at decimal 2.50 returns ₱250, which is ₱150 of profit plus the ₱100 stake. At 3/2 the profit is ₱150 on ₱100, and at +150 it is the same ₱150.
These are arithmetic examples with round numbers, not real prices.
Converting between formats
Wikipedia’s page on fixed-odds betting gives the conversion rules, and they take a calculator and under a minute once you have done a few. Decimal is the easiest anchor, because the other two convert to it and from it.
- Fractional to decimal: divide the fraction and add 1. The fraction 4/1 gives 4, plus 1 is 5.00.
- Plus American to decimal: divide by 100 and add 1. The number +400 gives 4, plus 1 is 5.00.
- Minus American to decimal: divide 100 by the number without its minus sign and add 1. The number -400 gives 0.25, plus 1 is 1.25.
- Decimal to implied chance: divide 1 by the decimal price. A price of 1.25 gives 0.80, which is 80%.
The table below applies those four steps to seven round prices. Decimal 1.91 is rounded from 1.909, which is the price that American -110 converts to, so its chance is shown as about 52.4%.
| Decimal | Fractional | American | Implied chance |
|---|---|---|---|
| 1.25 | 1/4 | -400 | 80.0% |
| 1.50 | 1/2 | -200 | 66.7% |
| 1.91 | 10/11 | -110 | about 52.4% |
| 2.00 | 1/1 | +100 | 50.0% |
| 2.50 | 3/2 | +150 | 40.0% |
| 3.00 | 2/1 | +200 | 33.3% |
| 5.00 | 4/1 | +400 | 20.0% |
Implied chance and the sportsbook’s margin
A price converts to the chance at which the bet breaks even. Wikipedia’s page on odds states it for moneyline: a bet on +X is fair if the probability is 100 divided by (X + 100), and a bet on minus X is fair if the probability is X divided by (X + 100). So +150 is fair at 40%, and -200 is fair at 66.7%.
Add up the implied chances of every outcome in a market and the total lands above 100%. Wikipedia’s fixed-odds entry calls the excess over 100% the overround and describes it as the bookmaker’s profit built into the prices. The Tennessee regulator’s glossary shows the same idea in another form: a bettor who wagers $110 to win $100 pays a $10 difference called the vigorish, also known as juice.
For example, take a two-way market priced at decimal 1.91 on both sides. Each side implies about 52.4%, and the two together come to about 104.7%. The 4.7 points above 100 are the margin, and no bettor can remove it by choosing a side.
The main market types
A market is the question the bet answers. Three cover most of what appears on a sports screen, and the detail pages linked below take one sport each.
| Market | The question | Settles on | Where to read more |
|---|---|---|---|
| Moneyline or 1X2 | Who wins? 1X2 adds a draw outcome: home, draw, away | The final result | MPBL moneyline odds worked through |
| Spread or handicap | Does a side win after points are added or taken away? | The final margin against the line | what PK betting means on a line |
| Total or over/under | Do both sides combined score over or under a number? | The combined score | how MPBL totals turn into payouts |
The moneyline is the simplest. The Tennessee Sports Wagering Advisory Council glossary defines a money line wager as a wager on the outcome of a sporting event outright, with fixed odds in relation to the amount wagered. It also defines the favorite as the team expected to win and the underdog as the team not expected to win.
The spread, which is called the handicap in many countries, gives the weaker side points or takes them from the stronger one. Wizard of Odds describes a point spread as a handicap given to the weaker team, or deducted from the stronger one. The total is the third market: the same glossary defines over/under as a bet on whether the aggregate score of a game will be over or under a particular number of points.
Individual-contest sports such as combat sports usually pair the moneyline with extra markets on how and when the contest ends. Reading UFC odds for fighters and rounds goes through those.
How settlement works
Settlement is the moment a bet becomes a win, a loss or a refund. Three outcomes beyond win and lose matter before a first stake.
- Push. A spread or total with a whole-number line can land exactly on the line. Wizard of Odds notes that both spread bets push if the favourite wins by exactly the spread, and that over and under bets push if the total equals the number. Wikipedia’s point spread entry says a push is treated as no action, with no money won or lost, and lines are often set on half-points to remove it.
- Void. A voided wager is one the sportsbook cancels after acceptance, and the Tennessee glossary defines a cancelled wager as one that cannot be determined under the sportsbook’s approved house rules. The stake is returned. In a multiple bet, house rules usually say what happens to the remaining legs, so read them.
- Dead heat. Two competitors tie for a winning place in a race or on a leaderboard. Each sportsbook publishes its own dead heat rule, including how the stake is split, and the rule sits in the settlement section of the sportsbook’s rules.
Postponement and abandonment windows, extra-time rules and what counts as the result differ by sportsbook and by sport. The sportsbook’s own settlement rules, found in its help or rules section, are the document that decides a disputed bet.
Problems and fixes
You read a price as 2.50 and the screen shows +150 for what looks like the same game.
The screen is set to a different odds format. Both numbers describe one price, so open the display settings and switch the format, or convert with the steps above.
A spread bet came back as a refund instead of a win or a loss.
The result landed exactly on a whole-number line, which is a push. The stake is returned and no profit is paid, so the bet is not a mistake in settlement.
A total and a spread on the same game seem to contradict each other.
They answer different questions. The spread concerns the margin between the two sides, and the total concerns the combined score, so both can be priced at the same time.
Where to go next
Three pages go deeper, each on one question.
| Page | The question it answers |
|---|---|
| PK betting page for pick’em lines | What does PK mean on a line, and how does a spread of zero settle? |
| MPBL odds page for Philippine basketball | How do a moneyline, spread and total on one game become payouts? |
| UFC odds page for fight prices | How are favourites, method of victory and rounds priced and settled? |
Terms in this guide are defined in the casino terms explained glossary, and the difference between a sportsbook, a studio and a casino is on the casino operator page.
Staking rules that come before odds
Keep staking separate from reading. The bankroll management meaning page covers fixing a budget before play and treating it as final. The turnover meaning entry shows how repeated stakes add up, which matters because a ₱100 budget staked five times is ₱500 of turnover.
Sports betting is for people aged 21 or over. The responsible play page lists the limits and self-exclusion steps to set before the first stake, and a price shown as an implied chance is a reason to expect to lose some stakes, not a way to avoid losing them.
Guides in this section
FAQ
What is the difference between decimal, fractional and American odds?
They are three ways of writing one price. Decimal odds show the total return per 1 staked, fractional odds show the profit relative to the stake, and American odds show the profit on 100 (a plus sign) or the stake needed to profit 100 (a minus sign). Decimal 2.50, fractional 3/2 and American +150 are the same price.
How do I turn American odds into decimal odds?
For a plus number, divide it by 100 and add 1, so +150 becomes 2.50. For a minus number, divide 100 by the number without its minus sign and add 1, so -200 becomes 1.50. Fractional odds convert by dividing the fraction and adding 1.
What is a moneyline bet?
A moneyline bet is a wager on who wins the event outright, with no points added or taken away. The Tennessee Sports Wagering Advisory Council defines it as a wager on the outcome of a sporting event outright, with fixed odds. Sports with a draw often call the same market 1X2.
What does a push mean in sports betting?
A push is a tie between your bet and the line, for example a team that was given a 6-point handicap winning by exactly 6. No side wins, the bet is treated as no action and the stake is returned.
What happens to a bet when an event is cancelled?
The sportsbook's own house rules decide. The Tennessee regulator describes a cancelled wager as one that cannot be determined under the sportsbook's approved house rules. Read the settlement rules for that sport before you stake, because postponement windows differ.
Do lower odds mean a safer bet?
Lower odds mean the market rates the outcome as more likely, which is a statement about the price and not a promise about the result. A 1.25 price implies an 80% chance before the sportsbook's margin, and 1 time in 5 it still loses.