Convert between decimal, fractional, American, and implied probability formats instantly. Essential for comparing odds across different bookmakers.
Accepts decimal (2.50), fractional (6/4), or American (+150 / -200)
| Decimal | Fractional | American | Probability | Description |
|---|---|---|---|---|
| 1.50 | 1/2 | -200 | 66.7% | Strong favourite |
| 2.00 | 1/1 (Evens) | +100 | 50.0% | Even money |
| 2.50 | 6/4 | +150 | 40.0% | Slight underdog |
| 3.00 | 2/1 | +200 | 33.3% | Underdog |
| 4.00 | 3/1 | +300 | 25.0% | Longer shot |
| 6.00 | 5/1 | +500 | 16.7% | Outsider |
| 10.00 | 9/1 | +900 | 10.0% | Long shot |
| 21.00 | 20/1 | +2000 | 4.8% | Big outsider |
| 51.00 | 50/1 | +5000 | 2.0% | Huge longshot |
Type in odds in any format — decimal (2.50), fractional (6/4), or American (+150). The converter auto-detects the format.
Instantly view the equivalent odds in all four formats: decimal, fractional, American, and implied probability.
Use the probability bar to visualise the implied chance. Compare odds across bookmakers who use different formats.
Different bookmakers around the world display odds in different formats. UK bookmakers traditionally use fractional odds (6/4), European bookmakers use decimal (2.50), and American sportsbooks use moneyline (+150). If you bet across multiple platforms, being fluent in all formats is essential.
More importantly, understanding implied probability helps you identify value. If you believe a team has a 45% chance of winning but the implied probability from the odds is only 35%, that is a value bet. This converter helps you make that assessment instantly.
The implied probability also reveals the bookmaker's margin. In a fair coin toss, both sides should be 50% (2.00 decimal). But bookmakers might price both sides at 1.91 — implying 52.4% each, which totals 104.8%. That extra 4.8% is the bookmaker's margin.
See Also: Once you've converted your odds, use our Margin Calculator to check the bookmaker's overround, or try the Accumulator Calculator to combine multiple selections.
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