Tools
Odds converter
Convert odds between Decimal, Fractional, and American formats, and see the implied probability and bookmaker margin (overround).
Convert odds
Enter odds in any format and get the equivalent odds, implied probability, and return.
Decimal
2.35
Fractional
27/20
American
+135
A decimal price above 1.00, like 2.35.
Implied probability
42.55%
Potential return (per $100)
$235
Profit (per $100)
$135
Multiple odds converter
Convert a list of odds at once (e.g., comparing prices from different bookmakers).
| # | Decimal | Fractional | American | ChanceImplied probability | Return ($100) | Profit ($100) | Remove |
|---|---|---|---|---|---|---|---|
| 1 | 18/25 | −139 | 58.14% | $172 | $72 | ||
Chance 58.14%Profit $72 | |||||||
| 2 | 27/20 | +135 | 42.55% | $235 | $135 | ||
Chance 42.55%Profit $135 | |||||||
| 3 | 2/1 | +200 | 33.33% | $300 | $200 | ||
Chance 33.33%Profit $200 | |||||||
Overround (bookmaker margin)
Calculate the bookmaker's margin from a set of market odds (e.g., 1X2, Over/Under).
Implied probabilities
Home
53.76%
Draw
29.41%
Away
23.81%
Overround (margin)
106.98%
Quick guide
- Decimal: Total return per 1 unit staked (e.g., 2.35 returns 2.35 units).
- Fractional: Profit relative to stake (e.g., 27/20 returns 27 for every 20 staked).
- American: US style odds (e.g., +135 means a $100 stake returns $235).
- Implied probability: The chance the outcome will happen (e.g., 2.35 = 42.55%).
- Overround: The bookmaker's margin; above 100% means a built-in house edge.