Prediction market contracts are commonly discussed in terms of price or implied probability, while sportsbooks generally display prices using American odds.
Our printable implied probability conversion chart makes that calculation quick and easy.
Whether you’re comparing prices across the best prediction market apps, reviewing a sportsbook line, or learning how odds work, the sheet shows the corresponding American odds for every whole-number probability from 1% to 99%.
Printable Implied Probability Conversion Chart
Save the implied probability chart to your phone, bookmark this page, or print a copy to keep beside you while researching a market.
Probabilities below 50% convert to positive American odds, 50% convert to +100, and probabilities above 50% convert to negative odds. With the full scale in one place, you can spend less time converting and more time trading.
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Implied probability explained
Covers’ odds converter allows you to enter any of these odds variations and get them instantly translated into your preferred display, while also calculating the implied probability of those odds winning outright.
For example, a trade placed at +200 in American odds has a 33.33% implied winning probability. A trade placed at -200 in American odds has a 66.67% implied winning probability.
You can also define your odds conversion to a specific trade amount to see your expected profit if that wager should win. Odds with lower implied probability carry more risk and therefore pay out more than odds with higher implied probability and lower risk.
For example, a $100 trade at -200 in American odds (1/2 in fractional or 1.50 in decimal) with a 66.67 percent implied probability has the potential to profit $50 should it win (not total return, which would include your original trade amount). A $100 trade at +200 in American odds (2/1 in fractional or 3.00 in decimal) with a 33.33 percent implied probability has the potential to profit $200 should it win.
Other odds explained
American odds: American odds are presented in hundreds and thousands and are defined by the positive (+) or negative (-) value assigned. An easy way to think about American odds calculation is to think of them as currency exchanges in $100 increments.
Decimal odds: Decimal odds are the preferred variation for most countries outside of the U.S., including Europe, which is why they are often referred to as “European odds”. Instead of using positive and negative values or fractional equations, decimal odds display a simple value that you multiply your bet amount by to calculate your profit (money won) and overall return (profit and original risk amount).
Fractional odds: Fractional odds are most common in horse racing and futures markets. They’re essentially simple math: Dividing one number by another and then taking that sum and multiplying it by your bet amount. If the larger number is being divided by the smaller number, such as 3/1, then the odds will pay out more than the original bet risked. But if the smaller number is divided by, the larger number, such as 1/3, then the odds will pay out less than the original bet risked.
More Covers odds pages
Check out Covers plethora of odds pages to stay in the know:
