A contract trading at $0.63 is commonly read as a 63% market-implied chance. Use this calculator to make the math explicit before considering an order.
Prediction market odds calculator
Estimate implied probability, cost, payout, and maximum profit for one binary outcome contract. Includes an American-odds conversion. Does not include fees, spread, slippage, partial fills, or taxes.
- Implied probability
- 63%
- American odds
- -170
- Estimated cost
- $12.60
- Payout if correct
- $20.00
- Maximum profit
- $7.40
How to use it
- Enter current price for a Yes or No contract.
- Enter number of contracts you are considering.
- Check cost against maximum payout and profit.
- Inspect live spread and depth before acting; calculator cannot predict a fill.
Learn how prediction-market odds work, then check liquidity and order-book depth.
Publishers can also use the prediction-market odds widget with source attribution.