Betting Odds Calculator for NFL, NBA & MLB

An odds calculator is a tool to determine the potential payout from a given wager based on specified odds. They are particularly useful for novice and experienced bettors who wish to learn the potential returns and profits from a particular bet that they would like to place.

Certain betting odds calculators such as the AceOdds calculator can also calculate multiple selections and convert odds to different formats including American (moneyline), decimals and fractions as well as calculating the implied probability of your specified odds.

Implied probability is the conversion of betting odds into a percentage. It represents the sportsbook's estimated chance of an outcome actually happening. For example, American odds of -150 have an implied probability of 60%. Savvy bettors use an odds calculator to find this percentage and compare it against their own predictions; if you believe a team has a 70% chance of winning, but the implied probability is only 60%, that bet offers positive expected value (+EV).

This is one of the most common points of confusion for new bettors. Total profit is the actual money you win from the sportsbook. Total payout (or total return) is your profit plus your original stake returned to you. For example, if you bet $100 on a +150 moneyline, your total profit is $150, but your total payout is $250. Our betting calculator clearly displays both numbers so you know exactly what to expect.

You can convert American odds to decimal odds by using different formulas depending on whether the American odds are positive or negative. See the formula for positive and negative odds below:

Positive American Odds (e.g. +200):
Formula: Decimal Odds = 1+ (American Odds/100)
Example: If the American odds are +200, the conversion to decimal would be:
Decimal Odds = 1+(200/100) = 1+2 = 3.00

Negative American Odds (e.g. -150):
Formula: Decimal Odds = 1+(100/American Odds)
Example: If the American odds are -150, the conversion to decimal would be:
Decimal Odds = 1+(100/150) = 1+0.6667 ≈1.67

You will be grateful to know that our calculator does all the hard work for you!

Point spreads and over/under (totals) bets typically have standard odds attached to them, usually around -110 for both sides. To calculate your payout for these wagers, simply enter your stake and type -110 (or whatever the specific odds are) into the American odds field. The calculator will show that you need to wager $110 to win $100 in profit.

American odds are centered around a $100 baseline. A minus sign (-) indicates the betting favorite and shows how much money you need to wager to win $100 in profit. For example, if the odds are -150, you must bet $150 to win $100. A plus sign (+) indicates the underdog and shows how much profit you will win on a $100 wager. For example, if the odds are +150, a $100 bet yields $150 in profit. Our calculator instantly handles this math for any stake size you choose to input.

Yes, inherently. The "vig" (or juice) is the house edge that sportsbooks build directly into the odds themselves - such as offering -110 on both sides of a point spread instead of true even money (+100). Because our betting calculator uses the exact odds you input to determine your payout, the sportsbook's vig is automatically accounted for in the final return and profit numbers you see on your screen.

Calculating a moneyline payout depends on whether the American odds possess a plus (+) or minus (-) sign. For a negative favorite (e.g., -150), you must wager $150 to make a $100 profit. For a positive underdog (e.g., +150), a $100 wager returns $150 in net profit. To find your exact return without doing manual algebra, simply select 'American' format in our tool, enter your stake, type the moneyline value, and view the instant breakdown.

Yes! While this page is perfectly optimized to evaluate single-leg wagers like a point spread or futures bet, you can easily use it for complex multi-leg tickets. Simply use the configuration gear to set your desired number of selections (up to 20), or head over to our dedicated Parlay Calculator to watch how compounded odds exponentially inflate your total potential payout and implied probability.

An odds calculator focuses primarily on monetary output—telling you exactly how much cash you will receive in total payout and net profit based on your customized stake. An odds converter simply translates the price format itself, changing a number from American (+200) into Decimal (3.00), Fractional (2/1), or Implied Win Probability (33.3%). The AceOdds tool acts efficiently as both simultaneously.

Implied probability translates a sportsbook's listed odds into a percentage chance of that event occurring. For instance, even-money odds (+100) indicate a 50% implied probability. Successful sports bettors use this metric to find "value bets"—if your personal analytical model gives an NFL team a 60% chance to win, but the sportsbook’s line reflects an implied probability of only 52%, you have successfully pinpointed a positive expected value (+EV) wager.