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Converting lay odds to back odds

There are two types of odds quoted on betting exchanges — back and lay odds, whereas traditional bookmakers work only with back odds. Taking a lay position on outcome 1 is equivalent to taking a back position on outcomes X2 (double chance bet). Accordingly, 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, also taking into account the commission charged by the exchange.


Formula for lay odds to back odds conversion

formula for converting lay odds to back odds

where:

The odds in the formula are in decimal format.


Calculator

Lay odds to back odds converter
*
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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