Betfair Calculator

Easily calculate your back and lay odds on betting exchange sites such as Betfair, Betdaq and WBX.

Betting on betting exchange websites such as Betfair and Betdaq is a doddle. Their sports markets include football, horse races, american football and tennis and can all be wagered on with ease. Calculating the odds required to "green-out" (make a profit whatever the result) can be much more difficult.

This calculator is designed to help you find out if it is possible to make money by opposing your original bet.

Bet Information

I've backed a market, now I want to lay it

This page was created by Jon Winstanley. This web page is not associated with Betfair, Betdaq or any betting exchange company in any way.

This betting calculator is solely intended to be a tool for calculating optimum stakes. Jon Winstanley does not accept any responsibility whatsoever for any loss that may be sustained as a result of the use or misuse of the betting calculator irrespective of how that loss might be sustained.

Infomation and advice about responsible gambling