Prediction market price to odds converter
Turn a price in cents into implied probability, American odds and decimal odds, or go the other way. Add a stake to see how many contracts it buys and what it pays.
Convert a price
Edit either price and the other updates.
Equivalents
price ¢ = implied % · decimal = 100 ÷ price · +odds = 100 × (100 − price) ÷ price
Common prices at a glance
| Price | Implied | American | Decimal |
|---|---|---|---|
| 10¢ | 10% | +900 | 10.00 |
| 20¢ | 20% | +400 | 5.00 |
| 25¢ | 25% | +300 | 4.00 |
| 33¢ | 33% | +203 | 3.03 |
| 40¢ | 40% | +150 | 2.50 |
| 50¢ | 50% | +100 / −100 | 2.00 |
| 60¢ | 60% | −150 | 1.67 |
| 67¢ | 67% | −203 | 1.49 |
| 75¢ | 75% | −300 | 1.33 |
| 80¢ | 80% | −400 | 1.25 |
| 90¢ | 90% | −900 | 1.11 |
Prices are before fees. A fee raises your effective price, so the probability you need to break even is a little higher than the price shown.
Free guide: The Combo Tax
A short PDF on reading combo quotes, spotting markup and sizing a hedge, with worked examples. Delivered by email.
Questions
What does a 40¢ contract price mean?
A contract pays $1 if it settles yes, so a 40¢ price means the market puts the outcome at 40%. That equals American odds of +150 and decimal odds of 2.50.
How do I convert American odds to a contract price?
For positive odds, the price is 100 ÷ (odds + 100). For negative odds, it is −odds ÷ (−odds + 100). +150 becomes 40¢, and −150 becomes 60¢.
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