Prediction Market Odds Calculator
Turn a prediction market contract price into a probability and American odds.
A prediction-market price is a probability wearing a dollar sign. A contract that costs 62¢ pays $1 if it resolves yes, so the market is pricing a 62% chance, the same number a sportsbook would quote as -163 in American odds.
A prediction market contract price is a probability with a dollar sign: a contract at 62 cents pays $1 if it resolves yes, so the market is pricing a 62% chance. Enter a price, a percentage, or American odds and the calculator shows the rest.
Done with the math? Bet a real market.
These numbers are live on the BettorEdge marketplace right now, at prices set by bettors, not the house.
Related tools
Now get these prices for real.
The math is free. Better odds are on BettorEdge. Sign up for a shot at up to $100. No deposit needed.
How the Prediction Market Calculator works
What is a prediction market price?
On a prediction market, each contract settles at $1 if the event happens and $0 if it does not. The price you pay, between 0 and 100 cents, is the market's estimate of the probability. A contract trading at 62 cents means the market thinks there is a 62% chance the outcome resolves yes. That price IS the implied probability, no conversion needed.
Prediction market odds to percentage
Because the price already is a probability, converting to a percentage is direct: 62 cents equals 62%, 40 cents equals 40%. To go the other way, a 55% probability is a 55-cent contract. This is the same implied-probability math a sportsbook uses, just quoted as a price instead of a moneyline.
Contract price to American odds
To compare a prediction market price against a sportsbook line, convert the probability to American odds. A 62% chance (62 cents) is about -163 in American odds; a 40% chance (40 cents) is about +150. The calculator does this instantly, so you can see which venue is offering the better number on the same outcome.
Why prediction markets are surging
Prediction markets like Kalshi and Polymarket let people trade directly on outcomes, and BettorEdge runs on the same peer-to-peer idea for sports: you trade a price with another person, not against a house. That structure removes the built-in vig, so a fair price is a fair price rather than one padded with juice.
Frequently asked questions
How do I convert a prediction market price to a percentage?+
The price already is the probability. A contract trading at 62 cents implies a 62% chance, and a 40-cent contract implies 40%. No math required, just read the price as a percent.
What is a 62-cent contract in American odds?+
A 62-cent contract implies a 62% chance, which is about -163 in American odds. Enter any price above to see the exact conversion.
Is a prediction market price the same as implied probability?+
Yes. A prediction market quotes probability directly as a price from 0 to 100 cents, so a contract price and its implied probability are the same number, unlike a moneyline, which hides the probability inside a formula.
Is this prediction market calculator free?+
Yes, free and no signup. When you want to trade a sports outcome peer-to-peer at a fair price, you can do that on BettorEdge.