A moneyline calculator turns plus and minus odds into money. Put $100 on a +150 underdog and you get $250 back: your $100 plus $150 profit. Put $100 on a -200 favourite and you get $150 back, because at -200 you have to risk $200 to win $100. Type any moneyline above with your stake and you’ll see the payout straight away, with the implied probability and the same price in decimal and fractional odds. It’s free and takes decimals and fractions too.
How the moneyline calculator reads the odds
The sign tells you who’s favoured. A minus number is the amount you stake to win $100. A plus number is what a $100 stake wins. Even money is +100 (or -100, same thing).
Plus odds: profit = stake × odds ÷ 100 Minus odds: profit = stake × 100 ÷ |odds| Implied chance = 1 ÷ decimal odds
So -200 implies a 66.7% chance and +150 implies 40%. Notice that’s 106.7% in total if those are the two sides of one game. The extra 6.7% is the book’s cut. Tick “Add the other team’s moneyline” and the calculator shows the vig and the fair no-vig price.
Moneyline vs the spread
A moneyline only asks who wins. The spread asks by how much. Heavy favourites on the moneyline pay very little, -400 returns $125 on a $100 bet, which is why plenty of bettors take the spread instead. Underdogs work the other way: if you think a +180 team just wins the game, the moneyline pays far better than taking the points.
Stringing moneylines together? The parlay calculator multiplies them for you. For a different odds format, the odds converter switches between American, decimal and fractional.
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