Odds Converter
Instantly convert between probability, decimal, American, and fractional odds. Essential for prediction market and sports betting analysis.
How to Use This Tool
Enter Any Format
Use the slider for probability, or type decimal/American odds directly.
See All Conversions
Instantly see equivalent odds in every format simultaneously.
Get Polymarket Price
See the exact share price and profit potential for Polymarket trades.
Understanding Odds Formats
Probability (Polymarket)
On Polymarket, share prices represent probabilities. A $0.65 share = 65% probability. If correct, you receive $1.00 per share.
Decimal Odds
Total return per unit staked. Odds of 2.50 means you get $2.50 back for every $1 wagered ($1.50 profit + $1 stake). Formula: 100 ÷ probability = decimal odds.
American Odds
Positive (+) shows profit on $100 stake. Negative (-) shows stake needed for $100 profit. +150 means $100 wins $150. -200 means stake $200 to win $100.
Fractional Odds
Shows profit relative to stake. 3/1 means $3 profit for $1 staked. Common in UK horse racing and traditional betting.
Ready to Trade?
Now that you understand the odds, start trading on Polymarket. Copy successful whale traders automatically with Polyfollow.