Odds Probability Calculator

About this Calculator

This online odds probability calculator will convert stated odds into a decimal value of probability and a percentage value of success.

Odds Calculator Formulas:

This calculator will convert "odds of winning" an event into a percentage chance of winning.  If odds are stated as an A to B chance of success then the probability of success is given as P = B / (A + B).  The percent chance of winning is calculated as P x 100.