Bookmaker Margin Calculator

A bookmaker's margin is the built-in profit that the bookmaker includes in the odds they offer. It represents the percentage by which the odds are lower than the true probability of an outcome, ensuring that the bookmaker can make a profit regardless of the outcome of an event.

To calculate a bookmaker's margin, first convert the odds into implied probabilities. Add up the implied probabilities for all possible outcomes in a market. Subtract 100 from the total. The result is the bookmaker's margin, expressed as a percentage.

To calculate the bookmaker's odds without the margin, you need to remove the bookmaker's margin from the odds. This can be done by converting the bookmaker's odds into implied probabilities, adjusting them to represent true probabilities, and then converting those adjusted probabilities back into odds.