Moneyline Calculator

Convert moneyline (American) odds to decimal and back, and work out the payout and profit on any stake in euros.

A moneyline calculator converts American odds into decimal format and calculates the payout and profit on any euro stake, making it easy to read US sportsbook prices from a European perspective.

What Is a Moneyline?

A moneyline — also called American odds — is the way American bookmakers write a price. The format uses a plus or minus sign followed by a number. A positive number like +150 means the profit you make on a 100 stake if the bet wins; a negative number like -200 means the stake you need to risk to win 100. The number expresses the same price as decimal odds, just in a different notation. To European bettors accustomed to decimal odds, moneyline format can seem confusing at first, but the conversion is exact: every moneyline maps to a unique decimal price, and vice versa. Understanding moneyline notation is useful if you ever need to read odds from an American sportsbook or compare prices across US and European operators. The two formats express identical prices; only the notation differs.

The key distinction is the sign. Positive moneylines (+150, +200, +300 and higher) represent longer odds — underdogs from the bookmaker’s perspective — where a smaller initial bet returns a larger profit. A +300 underdog means if you stake 100, you win 300 profit on top, for a total return of 400 — equivalent to decimal 4.00. Negative moneylines (-200, -400, and so on) represent shorter odds — favourites — where you risk more to win 100. A -200 favourite means you must stake 200 to win 100 profit, for a total return of 300 — equivalent to decimal 1.50. The boundary lies at even money, where both +100 and -100 convert to decimal 2.00. This structure means the moneyline tells you immediately whether something is a favourite or underdog: if the number is positive, it is an underdog; if negative, a favourite.

How to Convert Moneyline to Decimal

The conversion uses two separate formulas, depending on whether the moneyline is positive or negative, and the distinction is important because the two notations measure different things. For a positive moneyline, the formula is decimal = (moneyline / 100) + 1. A moneyline of +150 becomes (150 / 100) + 1 = 2.50 in decimal. A moneyline of +200 becomes (200 / 100) + 1 = 3.00. A moneyline of +300 becomes 4.00. Each higher positive number yields higher decimal odds, reflecting longer prices and lower implied probabilities.

For a negative moneyline, the formula is decimal = (100 / |moneyline|) + 1, using the absolute value of the negative number. A moneyline of -200 becomes (100 / 200) + 1 = 1.50 in decimal. A moneyline of -400 becomes (100 / 400) + 1 = 1.25. Negative moneylines always yield decimal odds below 2.00, because they represent short-priced favourites with higher implied probabilities of winning. The relationship is inverse: the larger the negative number, the lower the decimal odds, and the higher the implied probability.

The calculator performs both conversions instantly without any need for manual calculation. Once you have the decimal equivalent, you can calculate payout and profit the same way as with any other price: multiply the stake by the decimal odds to get the total return, then subtract the original stake to find the profit. This allows you to think in euros and decimal odds, which may be more intuitive, while reading prices from American bookmakers in moneyline notation.

What the Calculator Shows You

Enter an American moneyline and the calculator instantly converts it to decimal odds and shows the implied probability as a percentage. It also displays the fractional odds equivalent, so you can read the price in any of the four major formats: moneyline, decimal, fractional, or implied probability. Enter your stake in euros and the calculator shows the total payout (stake plus profit) and the net profit if the bet wins. The four formats all express the same price, so comparing them is a way to understand how American and European odds relate: +150 moneyline, 2.50 decimal, 3/2 fractional and 40.0% implied probability are identical prices, just written differently.

Worked Example

A EUR 50 stake on a moneyline of +150, which converts to decimal 2.50. Multiply the stake by the decimal odds: EUR 50 × 2.50 = EUR 125.00 total payout. The profit is EUR 125.00 − EUR 50.00 = EUR 75.00. So a +150 bet (decimal 2.50) on EUR 50 returns EUR 125.00 for a EUR 75.00 win. The data sheet also notes a comparison: a favourite at -200 converts to decimal 1.50. The same EUR 50 stake would return EUR 75.00, a profit of just EUR 25.00. This shows how negative moneylines (short prices) yield lower profits on the same stake compared to positive moneylines (longer prices), because the odds are lower and the bookmaker’s edge is stronger.

Moneyline to Decimal Conversion

A reference table showing how different moneylines convert to decimal odds and the corresponding payout and profit on a EUR 50 stake.

Reading the Odds in Any Format

The same prices across every odds notation: moneyline, decimal, fractional, and implied probability.

Understanding the Moneyline Boundary

The moneyline format has a structural quirk: the switch between positive and negative happens exactly at even money. A moneyline of +100 means even money (decimal 2.00), as does -100. There is no such thing as a moneyline between -100 and +100; the notation jumps directly from +100 to -100. Prices longer than decimal 2.00 are written with a plus sign and positive numbers; prices shorter than 2.00 are written with a minus sign and negative numbers. This boundary is purely a notational rule; it does not reflect any discontinuity in the actual prices themselves. All prices convert smoothly: as odds lengthen, the moneyline becomes more positive; as odds shorten, it becomes more negative.

The negative moneyline -110 is one of the most common short prices on American sportsbooks. It converts to decimal 1.91 with an implied probability of 52.4%, representing a modest favourite — not a strong favourite like -200 (decimal 1.50, 66.7% implied), but a slight edge for one side. This price structure is standard because American books often use -110 as a baseline short price. For comparison, -200 is a much shorter price, requiring you to stake 200 to win 100. A -110 favourite is considerably less risky than a -200 favourite, reflecting the bookmaker’s view of likelihood. Understanding this boundary helps you recognize when a moneyline is positive (longer odds, higher profit potential) versus negative (shorter odds, lower profit potential), and instantly estimate whether the price is longer or shorter than even money just by looking at the sign. The sign difference is crucial: +100 is an underdog at decimal 2.00, while -200 is a favourite at decimal 1.50. Confusing the two can lead you to bet on much worse odds by accident.

When to Use Moneyline

Moneyline odds are standard on every major US sportsbook, so any European bettor betting with an American operator will encounter them regularly. They are unavoidable if you want to use American bookmakers, and many of the largest US sportsbooks do not offer decimal or fractional odds as an alternative. The moneyline calculator makes working with these prices painless: enter the American odds and instantly see the conversion to decimal, fractional and implied probability. You can then calculate your stake and payout in euros without any mental arithmetic.

The primary benefit of moneyline conversion is clarity. An unfamiliar price like -110 becomes instantly understandable when you see it converts to decimal 1.91, revealing it as a modest favourite. Equally, +300 instantly becomes decimal 4.00, showing it is a long-priced underdog. Without conversion, -110 and +300 look equally confusing to a European reader accustomed to decimal 1.50 and 3.00. The conversion removes that mental friction.

Moneyline odds are also useful for comparing prices across operators: if you see a moneyline price from a US book and want to compare it to a decimal price from a European book, converting both to decimal makes the comparison instant and removes any notational confusion. Many European bettors avoid American bookmakers simply because they are unfamiliar with the moneyline notation, but converting moneyline to decimal removes that barrier entirely. The reference table shows that a moneyline of +300 is decimal 4.00, -200 is decimal 1.50, and -400 is decimal 1.25. Recognizing these equivalents helps you spot value and compare odds across different regions and operators without hesitation.

Common Mistakes

A common error is using the positive moneyline formula on a negative moneyline, or vice versa — the two formulas are different and cannot be swapped. Another mistake is reading +150 as decimal 1.50, when it actually converts to 2.50; the plus sign always indicates an underdog with longer odds. Many bettors also forget that the payout figure includes the returned stake, so the profit is payout minus stake, not payout alone. Finally, mixing up the meaning of negative and positive moneylines is common when reading quickly: negative always means favourite (shorter decimal odds), positive always means underdog (longer decimal odds), and the sign difference is crucial to interpreting the price correctly.

Moneyline vs Decimal

The same price expressed in moneyline and decimal formats reveals whether it is a favourite or underdog.