Calculator
Enter your figures
The calculator will show full, half and quarter Kelly recommendations.
How to use this tool
Enter the requested figures, press the calculate button and review the result. The explanation below shows what each output means.
What Kelly Criterion measures
This calculator supports the concept of what kelly criterion measures. Use the output as an educational aid and verify sportsbook rules before placing a bet.
Fractional Kelly
This calculator supports the concept of fractional kelly. Use the output as an educational aid and verify sportsbook rules before placing a bet.
Model uncertainty
This calculator supports the concept of model uncertainty. Use the output as an educational aid and verify sportsbook rules before placing a bet.
Frequently asked questions
Does this calculator guarantee a profit?
No. It performs the stated calculation but cannot remove model error, price movement, limits or settlement risk.
Which odds format should I use?
Unless the page says otherwise, enter decimal odds. The separate odds converter can convert American and fractional prices.
Does the tool store my information?
No. Calculations run locally in your browser and are not saved by the calculator.