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Bet Fraction Calculator

Enter the posted odds, bet fraction, and live odds to calculate a new bet fraction.

New Bet Fraction:


The odds provided are based on the most conservative line found at the time of publishing (9am ET). If you can find better odds (and we hope that you can) you should feel comfortable increasing your bet fraction slightly.


The bet fraction (% of your bankroll) is for a risk tolerance of 5, which is consistent with Quarter Kelly. To adjust the bet fraction to your own risk tolerance, simply multiply 1) the bet fraction above by 2) your risk tolerance divided by 5. Therefore if you have a risk tolerance of 7, multiply the bet fraction by 1.4 (7/5).