Kelly Fraction Calculator

Compute optimal bet sizing from win rate and payoff, and see fractional Kelly options.


Kelly fraction = p − (q / b), where p = win probability, q = loss probability, b = average win / loss. Use fractional Kelly for lower variance.

Results

Kelly Fraction
Optimal Bet (₹)
Half Kelly Bet
Quarter Kelly Bet
Growth vs Fraction
Utility curve showing expected log growth for different fractions of the Kelly bet.
Fraction of Kelly Bet Size (₹) Expected Log Growth