Model │ Math · Free tool
Odds to Probability
Every odds price is a probability in disguise. The break-even win rate the bet asks you to clear. Enter a price in any format and read the percentage straight off.
Enter a price in any format, +150, 1.91 or 10/11.
American, decimal or fractional, the format is detected for you.
Implied probability ,
- Decimal ,
- American ,
- Fractional ,
A price is a probability you can argue with
Implied probability is the single most useful way to read odds: it turns a price into a percentage you can argue with. If the number the market implies is higher than your honest read of the outcome, the bet is asking too much.
- The break-even rate
- The implied probability is exactly how often the bet must win just to come out even. Clear it with your real win rate and the bet makes money; fall short and it does not.
- Favourite or underdog
- Above 50% is the favourite, odds of -110, -150, -200 and shorter. Below 50% is the underdog. Even money, +100, sits exactly on the 50% line.
- It still includes the vig
- A single posted price's implied probability is inflated by the bookmaker's margin, the true probability is a little lower. To strip the margin out you need both sides of the market: Vig & Fair Odds does that.
Need the price in every notation rather than just the percentage? The Odds Converter turns any field into all four.