Betfair Calculator

Easily calculate your back and lay odds

Betting on betfair 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', or in english - 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

Commission % rate

Toggle the bet typeClick here to switch to the lay bet calculator

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

My original stake

The odds my stake was matched at

The current odds

Calculate odds