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Odds converter · Kelly criterion · Match probability · Elo calculator
Odds Converter
Convert between decimal, fractional, American, and implied probability
FREE
Decimal Odds
American
Fractional
Implied Probability
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Enter any odds format above to convert
40%
60%
Kelly Criterion
Optimal stake sizing based on your edge and bankroll
FREE
Model Prob (%)
Bookmaker Decimal
Bankroll ($)
Kelly Fraction
Optimal Stake
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Edge
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Kelly %
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⚠ Negative edge — model gives no advantage at these odds. No stake recommended.
Match Probability
Sackmann serve-based win probability model
FREE
Player A — 1st Serve Won %
Player A — 2nd Serve Won %
Player B — 1st Serve Won %
Player B — 2nd Serve Won %
Player A — 1st Serve In %
Player B — 1st Serve In %
Win Probability
Player A
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Player B
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A
B
Fair odds: A — · B —
Elo Predictor
Win probability from Elo ratings with surface weighting
FREE
Player A Elo
Player B Elo
Home Advantage Adjustment
Elo Win Probability
Player A
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Player B
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A
B
Elo gap: —