Multilay betting calculator

The Multilay calculator calculates the stakes for:

• Laying all selections for a guaranteed level profit (laying an overround book)
• Lay dutching multiple selections for a level profit (if all of them lose)

Laying all selections for a guaranteed level profit (laying an overround book)
You have priced up the 4 semi-finalists of a tennis tournament to a 103.33% book and would like to enter orders on Betfair to lay them all for a total liability of £500. If you can get all 4 bets matched, you would make a guaranteed profit after commission of £19.00, whichever player wins. This represents a 3.8% return on your investment.


Lay dutching multiple selections for a level profit (if all of them lose)
You would like to lay 3 horses at 5/1, 6/1 and 7/1 on Betfair, and there is only £250 available to lay the 6/1 horse. If you hoover up all that money and lay the 2 other horses at the amounts recommended by Arb Cruncher, you would earn a profit of £722.40 if neither horse wins. If one of them were to win, you would lose the negative amount displayed in the Profit column for each selection.