American to Decimal Odds Converter
Convert American odds to Decimal, Fractional, and Implied Probability instantly. Professional betting tool with real-time bidirectional conversion.
Bet Visualization
About
This tool eliminates the complexity of switching between international betting formats. Whether you are analyzing markets in Europe (Decimal), the UK (Fractional), or the US (American/Moneyline), understanding the mathematical equivalence is critical for identifying value.
Misinterpreting odds leads to incorrect risk assessment. For instance, a common mistake is conflating 2.00 Decimal odds with 2/1 Fractional odds (the correct equivalent is 1/1). This converter standardizes all formats into a single mathematical truth, allowing you to calculate your Return on Investment (ROI) and Implied Probability without manual formula errors.
We use standard algorithms utilized by major bookmakers, ensuring precision up to two decimal places for standard formats and exact fractional reduction where possible.
Formulas
1. American to Decimal
For positive American odds (e.g., +150):
For negative American odds (e.g., -200):
2. Decimal to Implied Probability
D = Decimal Odds
P = Probability
Reference Data
| Decimal | American | Fractional | Imp. Probability |
|---|---|---|---|
| 1.10 | -1000 | 1/10 | 90.9% |
| 1.20 | -500 | 1/5 | 83.3% |
| 1.50 | -200 | 1/2 | 66.7% |
| 1.91 | -110 | 10/11 | 52.4% |
| 2.00 | +100 | 1/1 | 50.0% |
| 2.50 | +150 | 3/2 | 40.0% |
| 3.00 | +200 | 2/1 | 33.3% |
| 4.00 | +300 | 3/1 | 25.0% |
| 10.00 | +900 | 9/1 | 10.0% |
| 101.00 | +10000 | 100/1 | 0.99% |