Users of our Excel betting tracker spreadsheet with American odds (-110, etc.) often ask how to calculate parlay (multi odds) that are entered into the Bets worksheet.
In response we’ve created a tool that calculates parlay (multi) odds based on the individual selection odds. The calculator supports American / moneyline, decimal, fractional, Hong Kong, Indonesian, implied probability and Malay odds formats.
For those who would prefer an Excel approach there’s also a simple Excel parlay calculator that you can download. This spreadsheet currently only supports American odds. You can add it as an additional worksheet to your existing betting tracker.