Moneyline odds are the American plus and minus way of pricing a bet, and if you bet on European sites you mostly need them for one job: turning a price like +150 or -200 into the decimal odds you actually stake against. At Campeonbet your odds show in decimal by default, so 2.50 and 1.50 are your native language, not +150 and -200. The trouble starts when you wander into US sports or a market quoted in the American format and the screen hands you a sign instead of a clean decimal. This guide keeps decimal as the through-line. It shows you what a moneyline price means, pairs every American number with its decimal twin, and gives you two short conversion rules plus a table so you are never stuck. For the wider format picture, see how betting odds work.
Quick answer
A minus number is the favourite and a plus number is the underdog. To bet with it, convert to decimal. A plus price +X becomes decimal (X / 100) + 1, so +150 is 2.50. A minus price -X becomes decimal (100 / X) + 1, so -200 is 1.50. Read the decimal, work out your return as stake times decimal odds, and treat the American number as a label.
What a moneyline price actually means
A moneyline price is built around a 100 unit anchor, and the sign in front tells you which way it points.
A minus sign marks the favourite, the side expected to win more often. In American terms it shows how much you stake to win 100 in profit, so -200 means risk 200 to win 100. In the decimal terms you bet with, -200 is simply 1.50. A 10 stake returns 10 times 1.50, which is 15.00.
A plus sign marks the underdog, the side expected to win less often. In American terms it shows the profit on a 100 stake, so +150 means a 100 stake wins 150. In decimal, +150 is 2.50. A 10 stake returns 10 times 2.50, which is 25.00. The split between these two sides, and when a longer price is worth taking, is its own subject in our look at backing favourites against underdogs.
That is the whole trick. The minus or plus and the round number are the American habit of anchoring everything to 100. Decimal odds skip the anchor and tell you the total return per unit staked, stake included, which is why they slot straight into a payout sum without any mental gymnastics.
The two conversion rules
You only need two rules, and both land you in decimal.
For a positive price, +X, the decimal is (X / 100) + 1. So +150 gives 150 / 100, which is 1.5, plus 1, for decimal 2.50. A +250 underdog gives 250 / 100, which is 2.5, plus 1, for decimal 3.50.
For a negative price, -X, the decimal is (100 / |X|) + 1, using the size of the number and ignoring the sign. So -200 gives 100 / 200, which is 0.5, plus 1, for decimal 1.50. A -150 favourite gives 100 / 150, which is about 0.67, plus 1, for decimal 1.67.
Once you have the decimal, implied probability is 1 divided by that decimal. Decimal 2.50 gives 1 / 2.50, which is 0.40, so 40 percent. Decimal 1.50 gives 1 / 1.50, which is about 0.667, so roughly 67 percent. That probability is the figure you measure your own opinion against, covered more fully in our notes on sports betting math. Add up the implied probabilities across every outcome and they total more than 100 percent rather than a clean 100. That extra slice is the cushion explained in our piece on the bookmaker margin and overround.
The conversion table
Keep this to hand when an American price turns up. The decimal column is the one you bet with. The moneyline is the label you are translating, and the implied probability is what each price is really claiming.
| Moneyline | Decimal | Implied probability |
|---|---|---|
| -300 | 1.33 | 75.0% |
| -200 | 1.50 | 66.7% |
| -150 | 1.67 | 60.0% |
| -110 | 1.91 | 52.4% |
| +100 | 2.00 | 50.0% |
| +150 | 2.50 | 40.0% |
| +250 | 3.50 | 28.6% |
| +400 | 5.00 | 20.0% |
Read it left to right and the pattern is clear. Heavy favourites sit low in decimal, near 1.33 to 1.50, because the return per unit is small. The even line, +100, is decimal 2.00, the point where a winning bet doubles your stake. Underdogs climb above 2.00 as the implied probability falls. A +400 dog at decimal 5.00 is only a one in five shot by the book’s reckoning.
A worked example, decimal first
Say you find a market quoted American style. One selection is the underdog at +250 and the other is the favourite at -200. A two-way price like this is the same shape as a match-result market, the kind broken down in our guide to the 1X2 market, just without the draw. You want to stake 40 on the dog and 60 on the favourite. Convert first, then settle each in decimal.
The +250 underdog converts to (250 / 100) + 1, which is decimal 3.50. The -200 favourite converts to (100 / 200) + 1, which is decimal 1.50.
| Selection | Moneyline | Decimal | Stake | Return (stake x decimal) | Profit |
|---|---|---|---|---|---|
| Underdog | +250 | 3.50 | 40 | 140.00 | 100.00 |
| Favourite | -200 | 1.50 | 60 | 90.00 | 30.00 |
The underdog return is stake times decimal odds, so 40 times 3.50, which is 140.00. Take off the 40 stake and the profit is 100. The favourite return is 60 times 1.50, which is 90.00, leaving 30 profit after the stake. Notice the smaller stake on the longer-priced dog wins more, because a higher decimal pays more per unit. That trade-off, more reward for the less likely result, is exactly what the price is encoding.
You never had to do the American profit sums. Convert to decimal, multiply stake by decimal odds, and the payout falls out in one step.
How to read the price
In practice you rarely have to think about any of this on site. Across the football betting markets at Campeonbet your odds display in decimal by default, so a favourite shows as 1.50 and an underdog as 3.50 without a plus or minus in sight. You read the decimal, picture the return as stake times that number, and move on.
The moneyline format is something you meet at the edges. It turns up on US sports coverage, in pricing tables from American sources, and in the occasional market or feed quoted the American way. It is also worth knowing when you read previews of big international events, such as the way prices are framed in our walk through World Cup odds. When that happens, the two rules above bring the number back into decimal, which is the format you settle in anyway. Treat the American price as a translation exercise, not a new system to learn.
Why the implied probability still matters
The decimal gives you the payout, but the implied probability tells you what the price is claiming. A decimal of 2.50, the same as +150, implies a 40 percent chance. If you believe the underdog wins more often than 40 percent of the time, the price is in your favour. If you think it wins less often, the payout is tempting but the price is against you.
That comparison is the basis of expected value, the idea that a bet only earns its place when your estimated chance beats the chance implied by the odds. Converting moneyline to decimal does not make a bet good. It just puts every price in the one format you can read fluently, so the judgement is about the game and not about the notation. Over many bets, that habit of reading the price honestly is what feeds a healthy return on investment rather than a string of tempting payouts that quietly lose.
Frequently asked questions
What does +150 mean in decimal? It is decimal 2.50. The +150 marks an underdog, and the rule (150 / 100) + 1 gives 2.50. A 10 stake returns 10 times 2.50, which is 25.00, for 15.00 profit. You read the 2.50 and the plus number becomes a footnote.
What does -200 mean in decimal? It is decimal 1.50. The minus marks a favourite, and (100 / 200) + 1 gives 1.50. A 20 stake returns 20 times 1.50, which is 30.00, for 10.00 profit. The favourite pays less per unit because it is judged more likely to win.
Why does Campeonbet show decimal and not moneyline? Decimal is the standard across most of Europe and slots straight into a payout sum as stake times odds. At Campeonbet decimal is the default display, so you only need moneyline when you meet an American price elsewhere and want to bring it back into the format you bet with.
Are moneyline and American odds the same thing? Yes. Moneyline odds and American odds are two names for the same plus and minus format. They are standard in the United States, while decimal is more common in Europe, and fractional odds still appear in the UK and Ireland. All three describe the same underlying chance.
How do I turn any moneyline price into decimal? Use one of two rules. For a plus price, divide by 100 and add 1, so +200 is 3.00. For a minus price, divide 100 by the size of the number and add 1, so -200 is 1.50. Then implied probability is 1 divided by the decimal.
Conclusion
Moneyline odds are an American label, not a different kind of bet. A minus number is a favourite, a plus number is an underdog, and two short rules turn either one into the decimal odds you stake against at Campeonbet: (X / 100) + 1 for a plus, (100 / |X|) + 1 for a minus. The same decimal reading carries across the full range of betting markets you will price, from match results to totals. Read the decimal, work the return as stake times odds, and the American sign stops mattering. For the next step across every format, see our beginner betting guide.
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