This calculator is based on Harville’s Method (Harville, D.A. (1973) Assigning probabilities to the outcomes of multi-entry competitions.).
Harville’s method assumes that horse that won is automatically discounted from placing and the win probabilities of the remaining horses are adjusted back to 100%.
The win probabilities do not determine the probability that horse x finishes in position y.
These are totally unrealistic assumptions and should not be used in betting purposes as such. But do provide rough estimates.
Select the number of runners (between 2 and 25):
Enter probabilities for each runner (sum must be 100%):
Calculated Harville Probabilities:
|Exacta Combination||Probability||Implied Decimal Odds|