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Odds Converter

Convert American, Decimal and Fractional odds instantly — and see the true implied probability behind any line. The fastest way to read a price before you back it.

American
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Decimal
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Fractional
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Implied probability
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Implied probability is 1 ÷ decimal odds. It still includes the bookmaker's margin (vig) — the fair price is a little longer. That gap is exactly what our model measures. Strip the vig →

So is this line actually worth backing?

Our model prices every game with calibrated probabilities and flags where the book is off the fair line. See today's best edges — free.

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Odds conversion — quick answers

What does -110 mean in decimal odds?

American -110 equals 1.91 in decimal odds, an implied probability of 52.4%. You'd stake $110 to win $100.

How do I work out implied probability?

Implied probability = 1 ÷ decimal odds. For 1.91 that's 1 ÷ 1.91 = 52.4%. Across both sides of a market these add up to more than 100% — the excess is the bookmaker's margin.

How do I convert fractional to decimal?

Decimal = (numerator ÷ denominator) + 1. So 10/11 = (10 ÷ 11) + 1 = 1.91.