Combined Odds Calculator

Use this calculator for Either/Or promos that pay out if any one of your selections wins. Check out this lesson for a full walk-through.

Enter the Betfair lay odds for each selection. Exchange odds give a more accurate read on true probability than bookie odds, which carry a built-in margin.
Selections
COMBINED RESULT
Combined Fair Odds
0.00
The fair odds for at least one of your selections winning. If the promo pays more than this, it has positive expected value.
Combined Probability
0.00%
The combined probability that one of your selections wins. Calculated by summing the individual implied probabilities.
Enter odds for at least two selections to see the combined fair odds.