EXPECTED VALUE CALCULATION
How To Use This Calculator
This calculator estimates the Expected Value of a multi bet, as covered in chapters 3 and 4 of Simple Bets.
It will work for both head-to-head multis and same game multis.
The calculator automatically estimates lay odds to be 10% higher than the back odds. In reality, they may be higher or lower. To increase the accuracy of the calculator, try and get exact lay odds from Betfair.
Remember - as long as the EV is positive it means the bet will be profitable over the long run - but only if your odds are correct.
You might wish to only take bets above a certain EV (say, $5) to give yourself a margin of error.