This sports betting odds calculator keeps the input simple: enter American odds like -120, add an amount like $10, then choose whether that amount is your bet amount or your profit target. The page handles the math instantly and still shows the formats bettors care about most for a single wager: payout, profit, decimal odds, fractional odds, and breakeven probability.
Keep the input simple up front. American odds stay as the main entry, and the other formats show up as clean outputs instead of competing inputs. This layout also leaves room for a future parlay calculator to live as its own separate module.
Use the calculator the same way most bettors think through a single wager: start with the American price, decide whether you are entering a stake or a profit target, and then read the payout math from there.
If you type -120 and $10, the answer depends on what the $10 means.
Risking $10.00 at -120 returns $18.33 total, including $8.33 in profit.
Sometimes you mean “I want to win $10” instead of “I want to bet $10.” This view makes that explicit.
To win $10.00 at -120, you would need to risk $12.00 for a total return of $22.00.
A good sports betting odds calculator should answer the single-bet math fast without burying the core numbers. These sections explain what the tool is doing and why the layout stays focused on American odds first.
Most betting calculators ask for multiple odds formats at once. That is flexible, but it also makes the first interaction heavier than it needs to be if you are just trying to sanity-check a bet slip.
It is meant for single-bet math first: how much you risk, how much you win, what the ticket returns, and what probability the price implies before you decide whether the market is worth betting.
This quick conversion table helps if you want a fast reference for common sportsbook prices without typing each one into the calculator.
| American Odds | Decimal Odds | Fractional Odds | Implied Probability |
|---|---|---|---|
| -200 | 1.500 | 1/2 | 66.7% |
| -150 | 1.667 | 2/3 | 60.0% |
| -120 | 1.833 | 5/6 | 54.5% |
| -110 | 1.909 | 10/11 | 52.4% |
| +100 | 2.000 | 1/1 | 50.0% |
| +150 | 2.500 | 3/2 | 40.0% |
| +200 | 3.000 | 2/1 | 33.3% |
These are the questions bettors usually ask once they get past the raw payout number and want to understand what the odds actually mean.
Sports betting odds are calculated by converting the sportsbook price into three practical things: your potential profit, your total payout, and the implied probability behind the number.
If you risk $10 at +150, your profit is $15 and your total return is $25. If you risk $10 at -120, your profit is $8.33 and your total return is $18.33.
If you are building a multi-leg ticket instead of a single wager, use the parlay tool to combine odds and calculate the full payout.