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Kelly stake calculator

Calculate a stake from your bankroll, available odds, fair odds and your chosen Kelly fraction. No positive edge means no suggested stake.

Your inputs

Your bookmaker odds

Fair odds

Bankroll (€)

Kelly fraction

Decimal odds. Calculations run entirely in your browser; no data is saved.

Suggested stake

€14.55

Fair probability52.91%

Expected value+5.82%

Bankroll allocation1.46%

Positive modelled edge. Actual outcomes remain uncertain.

How the Kelly criterion works

Stake = bankroll × max(0, (odds / fair odds − 1) / (odds − 1)) × Kelly fraction. Fractional Kelly scales the full-Kelly stake. Even a positive edge can lose repeatedly; use a bankroll you can afford to lose.

These tools provide mathematical estimates, not financial advice or betting recommendations.

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