Every set of betting odds carries an implied probability, the chance of winning that would make the bet break even in the long run. This calculator converts American, decimal or fractional odds into that percentage so you can compare the price to your own estimate of how likely an outcome really is. If you think the true chance is higher than the implied probability, the bet has positive expected value; if it is lower, the book has the edge. Enter your odds in any of the three common formats and read off the implied win probability along with the fair decimal price. Everything is computed in your browser, so your numbers never leave your device.
Every set of betting odds carries an implied probability, the chance of winning that would make the bet break even in the long run. This calculator converts American, decimal or fractional odds into that percentage so you can compare the price to your own estimate of how likely an outcome really is.
Yes. Implied Probability Calculator is completely free, with no sign-up and no usage limits.
Yes. Implied Probability Calculator runs in any modern web browser. There is nothing to download or install.
Yes. Implied Probability Calculator runs entirely on your device in your browser, so nothing you enter is uploaded to a server.