Moneyline Calculator

This moneyline calculator converts American odds like -150 into the exact payout, profit, and implied win probability for any dollar stake, so NFL, NBA, MLB, and NHL bettors know the numbers before betting.

What Is a Moneyline Bet?

A moneyline bet is a straight wager on which team wins a game, nothing else attached — no point spread, no total, just the winner. Sportsbooks price that outcome using American odds, and the sign in front of the number tells you which side is favored. A minus number, such as -150, is a favorite: it shows the amount you would need to stake to win $100. A plus number, such as +150, is an underdog: it shows the profit you would earn on a $100 stake. The bigger the minus number, the heavier the favorite and the smaller the profit relative to the stake; the bigger the plus number, the longer the underdog and the larger the potential profit.

This is the default way nearly every US sportsbook quotes a game across the NFL, NBA, MLB, and NHL, often the first number bettors see on a listing, ahead of the spread or total. Because a moneyline only cares about the final result, it strips out the margin of victory a point-spread bet depends on — your team just needs to win. That simplicity is also why the pricing matters: the minus and plus numbers on either side of a matchup are not mirror images of each other, and reading them correctly is the first step to knowing what a given stake will pay out.

How a Moneyline Payout Is Calculated

The math behind a moneyline payout depends on which side of even money the odds sit on. For a favorite, priced with negative odds, profit equals stake multiplied by 100 divided by the absolute value of the odds. Take the Cowboys at -150: divide 100 by 150 and multiply by the stake to get the profit. For an underdog, priced with positive odds, profit equals stake multiplied by the odds divided by 100. At +150, you multiply the stake by 150 and divide by 100.

Once you have the profit, the payout is simple: payout equals stake plus profit. That payout is the total amount you receive if your team wins, not just the amount gained — the stake is built into the number the calculator shows.

The calculator also converts the odds into an implied win probability, the break-even chance of winning the price represents. For a favorite, that is the absolute value of the odds divided by the odds plus 100; at -150, that’s 150 divided by 250. For an underdog, it’s 100 divided by the odds plus 100; at +150, that’s 100 divided by 250. These formulas are mirror images of each other, which is why a minus price and a plus price of the same size do not imply the same probability — the favorite’s number is always the larger share.

What the Calculator Shows You

Enter the American odds for either side of a matchup and your stake in dollars, and the calculator returns four figures. The payout is the total dollar amount you’d collect if the bet wins, stake included. The profit is just the winnings on top of that stake. The implied win probability translates the odds into a percentage chance of winning, so you can judge how heavily a price favors one side without doing the division yourself. The calculator also shows the same odds converted to decimal and fractional format, so you can compare a line against another sportsbook that quotes odds differently. Together, these figures show exactly what a given stake on a given moneyline would return, what it would profit, and how likely the price implies that outcome to be.

Worked Example

Take a $50 moneyline bet on the Cowboys at -150. The selection is Cowboys to win (moneyline), priced at -150 in American odds, or 1.67 in decimal terms. Because -150 is a favorite, the profit formula is stake multiplied by 100 divided by 150. On a $50 stake, that works out to a $33.33 profit — smaller than the stake itself, which is typical of backing a favorite this short. Add that profit to the original $50 stake and the payout comes to exactly $83.33, the total amount the Cowboys bettor collects if the team wins.

The calculator also converts the -150 price into an implied win probability. Using the favorite formula — the absolute value of the odds divided by the odds plus 100 — 150 divided by 250 comes out to 60.0%. That is the break-even chance of winning the -150 price represents, before accounting for the sportsbook’s vig on the other side of the game.

For comparison, the calculator notes what the other side of the same matchup would look like. An underdog priced at +150 with that same $50 stake would pay $125.00 for a $75.00 profit, implying a 40.0% chance of winning rather than 60.0%. Side by side, the two numbers show what favorite and underdog pricing means in practice: the Cowboys bettor risks more for a shorter price and a higher implied chance, while the underdog bettor risks the same $50 for a bigger profit and a longer, less likely price. Both numbers come from the identical $50 stake, so the only variables changing between them are the odds and which side of the moneyline you’re on.

Payout and Profit on a $50 Moneyline Bet, by American Odds

The table below applies the same favorite and underdog formulas to a $50 stake across a range of American odds, from a heavy -200 favorite to a +200 underdog. Reading down the rows shows how payout and profit shrink as a price shortens and grow as it lengthens, while implied probability moves the opposite way. Each row uses the identical $50 stake, so only the price itself changes.

The Same Prices in Every Odds Format

American odds aren’t the only way a sportsbook can quote a price, and switching formats helps when comparing lines across different books. The table below takes the same set of odds from the previous table and lines them up in decimal and fractional format alongside the implied probability each price represents. The American, decimal, and fractional columns all describe the identical price — only the notation changes.

Even Money, the Vig, and What Your Payout Includes

The American odds line flips its sign right at even money: both +100 and -100 mean the same thing, a $100 bet that wins $100. Everything shorter than that belongs to the favorite as a minus price, and everything longer belongs to the underdog as a plus price — there is no middle ground where a game is priced any other way, aside from that single even-money point.

It’s also worth noting that the two sides of a moneyline market aren’t designed to add up to a fair 100% between them. On a typical two-way market, a favorite’s -150 and the underdog’s +130 don’t sum to even odds — the gap between the two implied probabilities is the sportsbook’s built-in edge, commonly called the vig or juice. That’s why you can’t simply take the favorite’s implied percentage, subtract it from 100, and call the remainder the underdog’s true chance of winning; the book has priced in its own cut on both sides.

Finally, remember that the payout figure isn’t the same as the profit. The payout includes your original stake as well as your winnings, so a bettor checking what a bet pays should expect the full return, not just the profit. Confusing the two is a common error.

When a Moneyline Bet Makes Sense

A moneyline bet makes the most sense when you have a clear view on which team will win and don’t want that opinion complicated by a point spread or total. Because the bet settles purely on the final result, it suits situations where you’re confident in the winner but less sure about the margin — backing a favorite you trust to win outright even without covering a spread, or backing an underdog you think can pull off the upset regardless of the final score.

Favorites and underdogs call for different bankroll thinking. A heavy favorite’s minus price means risking a larger amount for a small profit, so losses on short favorites are costly relative to the wins. An underdog’s plus price flips that: a smaller stake can return a larger profit, but the price reflects a lower expected win rate, so size those bets accordingly rather than chasing the bigger payout alone.

Because the two sides of a game rarely price to a fair 100% between them, it’s worth shopping the same matchup across more than one sportsbook, since small price differences change the payout on identical stakes. If you care more about the margin of victory than who wins, a point-spread or totals bet fits better than a moneyline. A parlay is worth considering only once you understand how a single moneyline behaves on its own, since combining lines multiplies both the risk and the complexity involved.

Common Mistakes

Reading -150 as if it were the profit is a common slip; it’s actually the stake needed to win $100, not what you’d earn. Bettors also mix up which side of the line is which, treating the minus price as the underdog or the plus as the favorite. It’s easy to assume the two moneyline prices reflect true chances, but they include the sportsbook’s vig, so they don’t add up to a fair 100%. Finally, the payout already includes your original stake, not just the profit — treating the two as the same number makes a bet look less profitable than it is.

Reading a Moneyline

Favorite, even-money, and underdog prices each mean something different for the same $50 stake, though every one is still a moneyline bet on a straight winner. The table below lines up the three cases side by side to compare risk against payout at a glance.