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Converting lay odds to back odds

On a betting exchange there are two types of odds quoted - back and lay odds whereas traditional bookmakers deal only with back odds. Taking a lay position on outcome 1 is equivalent to taking a back position on outcomes X2 (double chance bet). Respectively taking a lay position on outcome 2 is equivalent to taking a back position on outcomes 1X. Since laying an outcome can be regarded as backing the alternative outcomes, lay odds can be converted into equivalent back odds. This calculator finds that equivalent taking also into account the commission charged by the exchange.


Formula

formula for converting lay odds to back odds

where

The odds in the formula are in decimal format.


Calculator

Calculator converting lay to back odds
*
Required field
Lay odds:
i
Enter the lay odds (in decimal format) offered on the exchange!
Commission: %
i
(optional) Enter the commission charged by the exchange!



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