Number of legs

### 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.