Prediction Market Converter: Cents to Odds
A prediction market contract pays $1 if the event happens and $0 if not, so its price in cents is its implied probability. A 62-cent contract implies 62%, which is about -163 in American odds. A fee on winnings raises the break-even chance a little.
Key facts
- A binary prediction market contract pays a fixed amount if the event occurs, so its price approximates the event's probability.
- At a 62-cent price the implied probability is 62% and the equivalent American odds are about -163 before fees.
- A fee on profit lowers net odds and raises the break-even chance.
Prediction markets quote probabilities as prices, not odds. A contract trading at 62 cents is a 62% bet. This converter lets you compare it with a sportsbook price, and shows what a fee on profit does to the real odds you get. It runs in your browser, sends nothing anywhere and forgets your numbers when you close the page.
Prediction market converter
Turn on JavaScript to use the calculator. The worked example below shows the same math by hand.
What you enter and what you get
You enter
- Contract price (cents): Between 1 and 99.
- Fee on profit (%): Use the venue's fee. 0 if none.
- Number of contracts: a number.
You get
- Implied probability
- Cost of 100 contracts
- Profit if it settles at $1 (before fees)
- Fees on the profit
- Profit after fees
- Decimal odds after fees
- American odds after fees
- Break-even chance after fees
- If it settles at $0
How the calculator works
- Contract price ÷ 100 is the implied probability.
- Profit per contract if it settles yes is $1 minus the price, before fees.
- Subtract any fee charged on that profit.
- Decimal odds = 1 + net profit ÷ cost, and break-even chance = cost ÷ (cost + net profit).
A worked example
100 contracts bought at 62 cents with a 2% fee on profit.
| Item | Result |
|---|---|
| Implied probability | 62% |
| Cost of 100 contracts | $62 |
| Profit if it settles at $1 (before fees) | $38 |
| Fees on the profit | $0.76 |
| Profit after fees | $37.24 |
| Decimal odds after fees | 1.601 |
| American odds after fees | -166 |
| Break-even chance after fees | 62.47% |
| If it settles at $0 | -$62 |
What the calculator leaves out
- Fee schedules differ between venues and may also charge on entry. Enter the one that applies.
- Prices move, and liquidity can make large orders cost more than the quoted price.
- It assumes a contract settles at exactly $1 or $0.
How we checked it
Before it went on the page we checked it against a case worked by hand: a 62-cent contract has to read as 62% and an American price of about -163. The calculator is also run against thousands of odd entries such as blanks, zeros and huge numbers, so a bad entry shows a plain prompt and never a wrong number. The worked example above comes from the same code the calculator runs.
At a sweepstakes sportsbook
Prediction markets are a separate product with their own rules and regulators, not the same as sweepstakes sportsbooks. We include the converter because people compare prices across both. Check the rules that apply to you. Sweepstakes vs Social vs Real-Money Casinos explains the casino side of that picture.
Betting math is not betting advice. Only play with money you can afford to lose, and if gambling stops being fun, call or text 1-800-GAMBLER.
Frequently asked questions
Is a 62-cent contract a 62% chance?
It is the market's price for the event, so it implies 62%. It's an estimate, not a fact.
How do fees change the odds?
A fee on profit lowers your net winnings, so the real decimal odds and the break-even chance both get a little worse.
How do I compare it with sportsbook odds?
Convert the contract's net odds to American or decimal here, then compare with the sportsbook price after removing its margin.
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- Implied probability, Wikipedia (read 2026-10-05)
- Odds, Wikipedia (read 2026-10-05)
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