Odds to implied probability calculator
Convert decimal, fractional or American odds to implied probability, measure the bookmaker margin and remove the overround.
How it works
Decimal odds of 2.00 mean a 50% implied probability (1 / 2.00). In a two-way basketball market the two probabilities add up to more than 100%; the excess is the bookmaker’s margin. We remove it proportionally to estimate a “fair” probability. Compare that with your own estimate or our model — without a favourable gap a bet has no positive expectation.