Polymarket odds converter
A Polymarket price in cents equals the implied probability: 25¢ = 25%. In decimal odds that is 1 ÷ 0.25 = 4.00, in American odds +300 and in fractional 3/1.
Quick reference
| Polymarket price | Probability | Decimal | American |
|---|---|---|---|
| 10¢ | 10% | 10.00 | +900 |
| 25¢ | 25% | 4.00 | +300 |
| 50¢ | 50% | 2.00 | +100 / −100 |
| 75¢ | 75% | 1.33 | −300 |
| 90¢ | 90% | 1.11 | −900 |
Sportsbook odds include a margin (the vig), so their implied probabilities add up to more than 100%. Polymarket prices are set by traders, and the main costs are the spread and the taker fee. See Polymarket vs sportsbooks.
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